BPT · Professional Level
Corporate Tax Planning
Strategic corporation tax planning for companies and groups. Group structuring decisions: trading through divisions vs separate subsidiaries (considering loss utilisation, risk, commercial factors, NRB limit sharing), VAT grouping benefits and drawbacks, CT group relief planning (current year, brought forward within £5m + 50% restriction), consortium relief planning (for non-75% joint ventures). Close company planning: avoiding s.455 loans to participators, benefits vs dividends vs salary trade-offs, timing of income extraction. Remuneration planning from the EMPLOYER's perspective: salary vs bonus vs pension vs benefits, NIC efficiency (employer NIC 13.8% avoided via pension, salary sacrifice, some benefits), salary sacrifice arrangements (post-2017 restrictions). Capital allowances planning: timing of acquisitions (full expensing window), allocation of AIA (special rate pool first), short-life asset election, SBA planning. R&D relief planning: maximising qualifying expenditure, choosing between SME and RDEC schemes (sub-contractor and grant rules), merged scheme from April 2024, record-keeping and claim methodology. Patent Box planning: election decision, nexus calculations, maximising qualifying IP profits. CT payment planning: avoiding quarterly instalments (group size, augmented profits thresholds), IFA regime planning (election for 4% fixed amortisation, goodwill amortisation restrictions since April 2019/2020).
Learning Objectives
- •Evaluate the trade-off between trading through divisions vs separate subsidiaries
- •Design a tax-efficient group structure including VAT grouping and loss planning
- •Plan remuneration to minimise overall tax and NIC cost
- •Optimise the timing and allocation of capital allowances claims
- •Structure R&D claims to maximise relief under SME, RDEC, or merged scheme
- •Evaluate whether a Patent Box election is beneficial
- •Plan CT payment cashflow including the threshold tests for quarterly instalments
- •Apply IFA regime planning including the 4% fixed amortisation election
Group Structuring — Divisions vs Subsidiaries
A growing business must decide HOW to structure new activities: as DIVISIONS (branches within an existing company) or as SEPARATE SUBSIDIARIES (each a distinct legal entity).
Divisions within a single company:
- All profits and losses netted automatically
- Single CT computation — simple, low admin
- One CT band allowance (£50k-£250k) — full bands available
- All activities exposed to each other's risks (single legal entity)
- Cannot ring-fence capital (e.g., sell one division without selling the whole entity)
Separate subsidiaries (75% group):
- Each subsidiary has its own CT computation and returns
- CT bands DIVIDED among 51% group members — can increase overall effective rate
- Losses can be GROUP RELIEVED between 75% group companies (current year + b/f, subject to £5m + 50% restriction)
- Intra-group asset transfers at no gain/no loss (s.171 TCGA)
- Can sell subsidiaries individually (SSE applies if 10%+ shares held 12+ months in last 6 years in trading companies)
- Ring-fence risk — creditors of one subsidiary generally can't reach another
- Higher administrative costs (multiple companies to run)
Decision criteria:
| Factor | Favours divisions | Favours subsidiaries |
|---|---|---|
| Loss offsetting needed? | Yes — automatic netting | Still possible via group relief (but less automatic) |
| Distinct risk profiles? | No — all activities merge | Yes — risk ring-fenced per sub |
| Sale of one activity? | Difficult — must transfer assets | Easy — sell shares in that sub (SSE often available) |
| Admin simplicity? | Simpler — one company | More complex — multiple |
| Marginal tax rates? | Full CT bands available | Bands divided among 51% group |
Key tax insight — band sharing disadvantage:
If a company is split into 4 subsidiaries (4 x 51% group members), the £50k and £250k CT thresholds are divided by 4: each subsidiary has £12,500 small profits band and £62,500 main rate band. Far less favourable than a single company with £50k and £250k bands. The splitting can DRIVE UP the effective CT rate across the group, especially if activities would have fit within the single-entity thresholds.
Commercial factors often decisive:
- Liability ring-fencing: particularly important for risky new ventures, property-holding companies
- Exit flexibility: a subsidiary structure allows sale of individual businesses
- External investors: may prefer to invest in a specific subsidiary (JV structure)
- Different regulation: separate subs may be needed for regulated activities (financial services, healthcare)
Conversion between structures:
- Division → subsidiary: typically requires incorporation of the business (INCORPORATION relief s.162; intra-group reorganisation provisions)
- Subsidiary → division: would require transferring assets and trade up to parent; can use s.171 for no-gain-no-loss transfers within 75% group
- Both directions need careful stamp taxes, VAT, and direct tax planning
Group Loss Planning and VAT Grouping
Group relief — CT planning:
Current year losses:
- Trading losses, NTLRDs, and excess QCDs can be SURRENDERED between 75% group companies
- Use immediately if possible — tax saving at 25% (or 26.5% marginal) vs carrying forward
- Match profit years against loss years: planning the TIMING of loss realisation can shift tax between periods
- Consider loss surrendering entity (surrenderor) vs claiming entity (claimant) — same group but different tax years possibly
Brought-forward loss planning (post-April 2017):
- B/f trading losses, NTLRD, property losses, non-trading IFA can be group-relieved (since April 2017)
- BUT: subject to LOSS RESTRICTION — £5m deductions allowance per group + 50% of profits above £5m
- Deductions allowance shared among group companies; the designated "nominated company" determines allocation
- PLANNING: Optimise which group company uses the £5m allowance — usually the one with highest profits
- If total group profits < £5m per year: no restriction applies — free to fully use b/f losses
Worked example — group loss planning:
Group of 3 companies in 2024/25:
- A Ltd: profits £4m
- B Ltd: profits £3m
- C Ltd: loss (current year) £2m, plus brought forward losses £8m
Optimal plan:
- Surrender C's current year loss £2m to A (or B) as group relief — save CT £500k (25%)
- C has remaining b/f £8m. Can surrender to other members. Total group profits after CY loss: £7m − £2m = £5m (if surrendered to A and uses the full loss).
- Wait — surrendering C's £2m current year loss to A: A's profits drop to £2m. Plus B profits £3m, C profits £0. Combined = £5m.
- Use C's b/f £8m against remaining profits: £5m deductions allowance × 100% + 50% of remaining £0 = £5m of b/f used (exactly covers remaining profits)
- Group tax: £0. Remaining b/f: £3m carried forward.
Alternative: if profits had been higher (say £10m total), restriction would bite: £5m allowance + 50% × £5m = £7.5m usable; £2.5m taxable.
VAT grouping:
- UK bodies corporate under common control can register as a single VAT entity
- Ignored intra-group supplies → eliminates "sticking VAT"
- Single return, single registration number
- JOINT AND SEVERAL LIABILITY
When VAT grouping helps:
- Mixed groups (some exempt members — banks, insurers, property investment): VAT grouping eliminates sticking VAT on services provided BETWEEN taxable and exempt group companies. Major benefit.
- Large internal flows: simplifies administration, reduces cashflow
- Shared services: group centre billing subsidiaries without VAT hassle
When VAT grouping may NOT help:
- Fully taxable group with no material intra-group supplies: no benefit
- If one group member has high exempt supplies: partial exemption % applies to the WHOLE GROUP (can reduce recovery for all members)
- Joint and several liability: exposed to any member's VAT debts
Consortium relief:
- Company owned by 5 or fewer companies, each 5%+, total 75%+ (e.g., joint venture)
- Losses can be surrendered between consortium and members (or between members of the consortium company) in proportion to ownership
- Useful for joint ventures where < 75% held by any one member
- Combined with group relief if one member also has a 75% group
Close Company Planning
Most owner-managed companies are close companies (controlled by 5 or fewer participators or participator-directors). Special rules apply to prevent abuse.
Avoiding s.455 tax on loans to participators:
- s.455: 33.75% TEMPORARY tax on loans to participators outstanding 9 months + 1 day after period end
- Refunded 9 months after repayment period end
- Key: REPAY before the trigger date
- Avoid "bed and breakfast" repayments (repay and re-draw within 30 days — caught by anti-avoidance)
Planning approaches:
- Avoid the loan entirely: use salary, dividends, or commercial lending instead
- Time the repayment: repay before 9 months + 1 day from period end
- Convert loan to dividend: if repayment not possible, formally declare a dividend equal to the loan (clears the loan + creates a formal tax-paying dividend)
- Use a directors' loan account credit balance: if director has previously loaned money to the company, they can draw against that credit — not a participator loan
- Interest on loan: paying interest at official rate (2.25%) avoids a separate BIK — may be simpler than s.455 management
Benefits vs dividends vs salary — owner-manager trade-off:
| Extraction method | Company | Owner-manager |
|---|---|---|
| Salary | CT deduction; employer NIC 13.8% | IT 20/40/45% + employee NIC 8/2% |
| Dividend | No deduction (out of post-tax profits) | IT 8.75/33.75/39.35%; no NIC |
| Employer pension | CT deduction; no employer NIC | No IT, no NIC (within AA) |
| Benefit in kind (e.g., electric car) | CT deduction on costs + 100% FYA on e-car; employer Class 1A NIC 13.8% on BIK | IT on BIK value (only 2% for e-cars) |
| Director's loan | s.455 33.75% temporary tax + BIK if cheap | BIK on interest-free (2.25% × loan) |
Benefits vs dividends — the niche cases:
- Electric company car: 2% BIK rate; 100% FYA on purchase; employer NIC 13.8% on BIK. For a £50k electric car: BIK £1,000 × 40% HRB = £400 IT; employer NIC £138. Compare extracting £50k as dividend: £50k × 33.75% = £16,875. Major saving.
- Mobile phone: one exempt phone provided by employer — saves personal cost of a phone
- Workplace nursery: fully exempt, saves significant personal cost
Timing of dividend declarations:
- Dividends taxable in the YEAR DECLARED AND PAID
- If owner has other income making them additional-rate in current year, DELAY dividend to next year when they're basic/higher-rate
- Or: decide not to take excess dividends — leave in company at 19/25% CT (might become available at lower personal tax rate later or at sale under BADR)
- "Asset stripping" by drawing down reserves close to exit: can bring forward distribution to use BADR (10%) rather than future dividend rates
Remuneration Planning — Employer's Perspective
The total employment cost includes: salary + employer NIC + pension contributions + benefits. Minimising these together minimises cost.
Understanding employer NIC cost:
- Employer NIC 13.8% on salary above £9,100 (secondary threshold)
- Employment Allowance £5,000 waives first £5,000 of employer NIC (eligibility: multiple employees; NOT single-director companies since 2016)
- For every £1 of salary above £9,100, the company pays an additional 13.8p in NIC
- Gross up effect: to give an employee an extra £1, the company spends £1.138
Alternatives to salary (all avoid employer NIC):
- Employer pension contributions: no employer NIC; CT deduction; no IT/NIC to employee
- Salary sacrifice (post-2017 restrictions): employee swaps salary for benefits. Only SOME benefits still get tax savings since the 2017 optional remuneration arrangements (OpRA) rules:
- Still beneficial (exempt from OpRA): pension contributions; childcare vouchers (legacy); cycle-to-work; ultra-low emission cars (< 75g/km)
- No longer beneficial: company cars (except electric), gym memberships, mobile phones (1 phone exempt outside sacrifice), accommodation, medical insurance
- Benefits in kind: specific items can be tax-efficient (electric cars, cycle-to-work, eye tests, staff parties ≤ £150/head)
- Bonus timing: accrue in one CT year, pay within 9 months after year-end — CT deduction in accrual year
Bonus deductibility rule:
- Bonuses accrued in accounts deductible for CT ONLY if actually paid within 9 months of end of accounting period
- Otherwise: deduction in year of payment
- Valuable timing opportunity: accrue in high-profit year; deliver to individuals in next year
Worked example — remuneration decision:
TechCo wants to reward its COO with an extra £10,000 benefit. Consider:
| Method | Cost to company | Value to COO (after her tax) |
|---|---|---|
| Salary £10,000 (COO is HR) | £10,000 salary + £1,380 employer NIC = £11,380; less CT relief at 25% = £2,845; net cost £8,535 | £10,000 − 40% IT (£4,000) − 2% NIC (£200) = £5,800 |
| Dividend £10,000 | £10,000 out of post-tax profits; CT already paid £2,500 on pre-tax £12,500; net cost £10,000 | £10,000 − 33.75% div tax (£3,375) = £6,625 |
| Employer pension £10,000 | £10,000 pension; CT saving £2,500 at 25%; net cost £7,500 | £10,000 into pension (grows tax-free; 25% tax-free at retirement) |
| Electric car: £30,000 cost, 2% BIK | £30,000 × 100% FYA = £7,500 CT saving in Y1; employer NIC £600 × 13.8% = £83/yr; net Y1 cost £22,583 | £600 BIK × 40% = £240/yr IT. Value of car use: £5-10k/yr. Far cheaper than buying personally |
Ranking (for cash extraction): Pension > Salary > Dividend. Pension best for value accumulation (if long-term). Electric car: very efficient for a real need. Dividend last for new extraction (but useful to use existing retained profits).
Double benefits from pension:
- CT relief for company at marginal rate (19%-26.5%)
- No income tax for employee
- No NIC (employer or employee)
- Grows tax-free in scheme
- 25% tax-free at retirement
- Effective rate of tax on compensation paid as pension: close to zero (if 25% drawn tax-free; rest at retirement rate 20% or less)
Capital Allowances Planning
Capital allowances shelter taxable profits. Effective planning can accelerate tax savings.
Full expensing — the most valuable regime (for companies):
- 100% first-year allowance on NEW, UNUSED main pool P&M
- Permanent from April 2023; no annual cap
- Ideal for: manufacturing equipment, computers, office equipment, vehicles (excl. cars), most plant
- Special rate pool items (insulation, long-life assets): 50% FYA with remaining 50% going to pool
- EXCLUDED: cars, items for leasing (mostly), second-hand items
- On disposal: BALANCING CHARGE of full proceeds (because 100% was claimed)
Timing planning:
- Bring forward capital expenditure into the current year to accelerate deduction
- Particularly valuable when profits are in MARGINAL BAND (£50k-£250k) at effective 26.5% rate
- If profits are already below £50k, deferred deduction may be more valuable (future profits may be in 25% bracket)
- Contract vs delivery date: for FYAs/full expensing, usually EFFECTIVE DATE is when unconditional contract signed or delivery — check specific rules
AIA allocation — special rate pool first:
- AIA £1m per year (shared among 51% group companies)
- If spend exceeds £1m, AIA gives 100% relief up to the limit
- Beyond AIA: main pool 18%, special rate pool 6% WDA
- RULE: ALLOCATE AIA TO SPECIAL RATE POOL FIRST (lower WDA otherwise)
- Example: £300k main pool + £500k special rate pool. AIA £1m remaining. Allocate £500k to special rate pool (save 6% WDA) + £500k to main pool (uses £500k of AIA). Main pool remaining £0. All items fully expensed.
- If AIA allocation had been wrong: £500k main pool expensed via AIA + £500k to SRP. SRP without AIA: 6% × £500k = £30k WDA in year 1; then declining reducing balance. Tax deferred not accelerated.
Short-life asset (SLA) election:
- For assets expected to be disposed of within 8 years of acquisition (end of 8th anniversary year)
- Election keeps asset in its OWN SEPARATE POOL, not the main pool
- On disposal: BALANCING ALLOWANCE (or charge) immediately crystallises
- If no SLA election: disposal proceeds just reduce the main pool (no immediate balancing adjustment)
- Valuable when asset is expected to be sold for LESS than its TWDV — get balancing allowance instead of slow WDA
Structures and Buildings Allowance (SBA):
- 3% per year straight-line on new non-residential buildings
- Claim over 33⅓ years — long period, modest annual benefit
- No balancing adjustment on sale, but SBA already claimed is ADDED BACK to cost for CGT
- Planning: don't forget to claim — total value of SBAs over the 33 years can be significant (e.g., £5m building → £150k SBA per year)
Private use assets (for sole traders, not relevant for companies):
- Not applicable to companies — company can't have "private use" (the car is used by a director who is taxed on BIK, but the company gets full allowances)
Worked example — capital allowances strategy:
Manufacturing company, year to 31 March 2025. Planned expenditure:
- New manufacturing machinery (main pool): £1,500,000
- New thermal insulation (special rate): £400,000
- Second-hand forklift: £80,000
- New commercial building: £2,000,000
Optimal strategy:
- New machinery (main pool, £1.5m): qualifies for FULL EXPENSING — 100% FYA, no cap. Claim full £1.5m.
- Thermal insulation (special rate, £400k): does NOT qualify for full expensing (SRP only gets 50% FYA). Use AIA instead — allocate to SRP (£400k of £1m AIA) for 100% relief.
- Second-hand forklift (£80k): full expensing NOT available (second-hand). Use remaining AIA: £1m − £400k = £600k AIA still available. Allocate £80k. 100% relief.
- Commercial building (£2m): claim SBA at 3% = £60k per year.
Year 1 total capital allowances: £1,500,000 + £400,000 + £80,000 + £60,000 = £2,040,000. Tax saving at 25%: £510,000.
R&D Relief and Patent Box Planning
Two of the most valuable incentives for companies undertaking innovation in the UK.
R&D relief planning — general principles:
- Ensure qualifying activity is clearly identified and documented
- Ensure qualifying expenditure categories are captured (staff, subcontractors at 65%, consumables, software/cloud, data, power)
- File claim within 1 year of normal CT filing deadline (2 years from end of AP)
- Advance assurance available for small companies (first claim) — reduces risk
Choosing between SME and RDEC schemes:
| SME scheme | RDEC scheme | |
|---|---|---|
| Definition | < 500 employees AND (< €100m turnover OR < €86m assets) | Anyone else (includes large companies; SMEs in some circumstances) |
| Mechanism | Enhanced deduction 186% (86% uplift) | 20% above-the-line credit (taxable) |
| Net benefit (profits-making, 25% CT) | Effective 86% × 25% = 21.5% of spend | 20% × (1 − 25%) = 15% of spend |
| Loss-making | Payable credit 10% (14.5% if R&D-intensive) | Credit banked forward; taxable |
When an SME must use RDEC:
- Subcontracted work (SME carrying out work for another company receiving the benefit)
- SME received subsidies or grants affecting the qualifying expenditure
- Connected party subcontracting rules in some cases
Merged scheme (from April 2024):
- Unified 20% above-the-line credit for all companies (accounting periods starting 1 April 2024+)
- Essentially RDEC-style for everyone
- Additional uplift for R&D-intensive SMEs (≥ 30% R&D/total expenditure)
Maximising R&D claims:
- Identify ALL qualifying projects — not just "big" R&D. Many product improvements qualify if they involve scientific/technological uncertainty.
- Capture ALL qualifying expenditure — staff costs (direct + employer NIC + pension), software, cloud costs, subcontractors (65% inclusion), consumables
- Apportion correctly where staff split between R&D and other activities
- Maintain contemporaneous records (project documentation, time sheets)
- Consider advance assurance for certainty
Recent changes:
- SME enhanced deduction reduced from 230% to 186% from April 2023
- SME payable credit reduced; R&D-intensive higher rate preserved
- Overseas R&D restrictions (from April 2024 for some activities — UK-only qualifying expenditure)
- Data and cloud computing added as qualifying categories from April 2023
- Merged scheme from April 2024
Patent Box planning:
- 10% effective CT rate on qualifying IP profits (vs 25% main rate)
- Deduction = Profit × (Main rate − 10%) / Main rate = Profit × 15/25 = 60% deduction
- Formal election required (by 12 months after the end of the first AP in which Patent Box applies)
- Election is REVOCABLE but must be considered carefully — interacts with R&D relief
Qualifying IP:
- Patents granted by UK IPO, European Patent Office, or EEA equivalents
- Supplementary protection certificates, plant varieties, regulatory data protection
- COMPANY MUST OWN or EXCLUSIVELY LICENSE the IP
- Development or active ownership conditions (must have contributed significantly to the IP's creation or development)
- NEXUS fraction: relief linked to actual R&D expenditure that created the IP (prevents "shell" IP holding)
Practical Patent Box claim steps:
- Identify qualifying IP rights
- Identify income from qualifying IP (royalties, notional royalties on product sales, damages, proceeds of sale of IP)
- Apply the Patent Box income streaming calculation
- Deduct routine return (routine profit from activities other than IP — 10% of routine expenses)
- Apply the nexus fraction (R&D expenditure ratio)
- Result = Patent Box profit eligible for 10% effective rate
Combined benefit:
- R&D costs eligible for enhanced deduction (186% under SME / 20% credit RDEC / merged)
- Resulting IP (if patented) → Patent Box 10% on future profits
- Ecosystem of incentives for UK-based innovation
CT Payment Planning and IFAs
CT quarterly instalments — thresholds:
- Augmented profits > £1.5m (per 51% group member) → QUARTERLY INSTALMENTS (large company)
- Augmented profits > £20m → EARLY quarterly instalments (very large)
Planning to AVOID quarterly instalments:
- Keep augmented profits below threshold per group member (if legitimate — not artificial fragmentation)
- For NEW 51% group members: becoming a member DIVIDES the threshold. 2 members: £750k threshold each; 3 members: £500k each; etc.
- Time capital expenditure: accelerate into the year to reduce taxable profits below threshold
- Time pension contributions to reduce profits
- Year 1 relief for new large companies: 12-month exemption in the first AP where they become "large" (smooth transition)
Payment date timeline:
| Size | 1st instalment | 2nd | 3rd | 4th |
|---|---|---|---|---|
| Large | 14th of month 7 of AP | Month 10 | Month 13 | Month 16 |
| Very large | 14th of month 3 of AP | Month 6 | Month 9 | Month 12 |
Example 12-month AP to 31 March 2025:
- LARGE: 14 Oct 2024, 14 Jan 2025, 14 Apr 2025, 14 Jul 2025
- VERY LARGE: 14 Jun 2024, 14 Sep 2024, 14 Dec 2024, 14 Mar 2025 — ALL WITHIN THE AP
Cashflow impact of very large status: pays tax BEFORE knowing the full year's results — requires careful estimation. Over/under-payment rectified with later returns and interest.
IFA regime planning:
Goodwill and customer-related intangibles restrictions:
- Acquisitions from 1 April 2002: IFAs generally eligible for amortisation relief (follows accounting)
- From 8 July 2015: restrictions on goodwill and customer-related intangibles — NO relief on these (capital loss only on disposal)
- From 1 April 2019: Partial restoration of relief on ACQUIRED goodwill (linked to qualifying IP) — amortisation allowable up to 6x the value of qualifying IP acquired
- Planning: structure M&A to maximise relievable IFAs (brands, customer lists separately valued where possible)
4% fixed amortisation election:
- Election to use 4% straight-line amortisation INSTEAD of accounting amortisation
- Irrevocable election on asset-by-asset basis
- Typically useful when:
- Accounting amortisation is very slow (IAS 38 — useful life 20+ years)
- You want predictable, faster tax relief
- Accelerated relief from the election particularly valuable for a GOODWILL impairment scenario
IFA transfers within groups:
- Intra-group transfers of IFAs: no gain/no loss under s.775 CTA 2009
- Similar to s.171 TCGA for chargeable gains, but for IFAs specifically
- Transferee continues the transferor's tax position
Disposals of IFAs:
- Gains/losses are REVENUE (not capital) in the IFA regime
- Trading IFA: into trading income
- Non-trading IFA: non-trading surplus/deficit (similar to NTLRD)
- Reinvestment relief: gains on IFAs can be rolled over into replacement IFAs (similar to rollover relief for tangible assets)
Planning considerations:
- Distinguish carefully between IFAs (post-2002, revenue treatment) and older intangibles (pre-2002, CGT rules)
- Goodwill: expensive given restrictions — consider whether to acquire as shares (SSE) vs trade and assets
- Software: generally IFA or plant depending on nature — important for capital allowances planning
Examiner Focus
Common Pitfall
Study Tip
Examiner Focus
Watch Out
Study Tip
Study Tip
Written Practice
Corporate Tax Planning: Applied Requirement
Prepare a focused written answer with clear workings and justified recommendations.
A client has asked for a concise exam-style written response for a client or senior manager on corporate tax planning. Use the key rules, calculations, risks, and professional judgement from this topic to structure your answer.
Answer Prompts
- •Identify the issue and explain why it matters in the scenario.
- •Apply the relevant technical rule, calculation, or framework.
- •State the commercial, ethical, tax, reporting, or assurance implication.
- •Conclude with a clear recommendation or exam-ready judgement.
Marking Focus
- Application to facts rather than textbook recall
- Clear structure and answer-first communication
- Balanced judgement where there is uncertainty
- Commercially sensible conclusion
Key Definitions
Divisions vs subsidiaries
Divisions: single legal entity, automatic loss netting, full CT bands, all risks combined. Subsidiaries: separate entities, group relief (less automatic), CT bands divided among 51% group, ring-fenced risk, SSE on sale. Commercial factors often decisive.
51% group CT bands
CT thresholds £50k and £250k divided by number of 51% group companies. With 4 members: each has £12.5k / £62.5k bands. Can INCREASE overall effective CT rate vs a single company with full bands. Key consideration when structuring groups.
Group relief (brought forward losses)
Since April 2017, b/f losses (trading, NTLRD, property, non-trading IFA) can be group-relieved. Subject to £5m deductions allowance per group + 50% restriction. Nominated company allocates the £5m.
VAT grouping benefits
Single VAT registration for UK bodies corporate under common control. Ignores intra-group supplies — eliminates sticking VAT (important for mixed groups with exempt members). Joint and several liability. Partial exemption computed on group basis.
Consortium relief
Loss sharing in consortium structure: company owned by 5 or fewer companies each 5%+, total 75%+. Losses surrendered proportionally between members and consortium company. Useful for joint ventures below 75% ownership.
Full expensing
100% FYA on NEW UNUSED main pool P&M — companies only, permanent from April 2023, no cap. Special rate pool items: 50% FYA. Not available for cars, leased items, second-hand. On disposal: balancing charge of full proceeds.
AIA allocation strategy
£1m annual allowance (51% group shared). ALLOCATE TO SPECIAL RATE POOL FIRST to avoid slow 6% WDA. Main pool items can use full expensing (no cap) if new — saves AIA for SRP and second-hand items.
Short-life asset (SLA) election
Election for assets disposed of within 8 years of acquisition. Keeps asset in separate pool — balancing allowance on disposal if proceeds < TWDV. Without election: disposal just reduces main pool (no balancing allowance).
SME R&D scheme
< 500 employees AND (< €100m turnover OR < €86m assets). 186% enhanced deduction (pre-April 2024 or certain conditions). Loss-making: 10% payable credit (14.5% for R&D-intensive ≥ 30% spend). Replaced by merged scheme April 2024.
RDEC scheme
20% above-the-line taxable credit. Net benefit 15% (20% × (1 − 25%)). Used by: large companies; SMEs subcontracted; SMEs with grants; universally from April 2024 via merged scheme (with R&D-intensive top-up for SMEs).
Patent Box
10% effective CT rate on qualifying IP profits. Deduction = profit × (main rate − 10%) / main rate = 60% of profit for 25% main rate. Election required. Nexus rules link relief to actual R&D expenditure.
Quarterly instalments threshold
£1.5m augmented profits per 51% group member (LARGE — instalments months 7/10/13/16); £20m per member (VERY LARGE — instalments months 3/6/9/12 of the AP). New large companies: 12-month exemption in first AP of meeting threshold.
IFA regime
Post-2002 intangibles: amortisation follows accounting treatment (deductible); disposal gains/losses are REVENUE. Restrictions on acquired goodwill/customer intangibles post-2015 and some relief restored post-April 2019 (linked to IP ratio). 4% fixed amortisation election available.
Optional Remuneration Arrangements (OpRA)
Post-2017 rules: most benefits under salary sacrifice lose tax advantage (taxed on GREATER of cash salary foregone or BIK). Exceptions: pension contributions, cycle-to-work, ULEV cars (<75g/km), employer-provided childcare (legacy).
Key Formulas
Worked Examples
Related Topics
Key Takeaways
- ✓Group structuring: divisions vs subsidiaries trade-off. Subsidiaries give ring-fencing and exit flexibility but divide CT bands among 51% group (can increase effective rate). Full bands in single company; divided in group (£250k / number of members). Commercial factors often decisive.
- ✓Group relief: current year trading losses, NTLRDs, QCDs surrenderable between 75% group. Post-April 2017: b/f losses also group-relievable subject to £5m + 50% restriction. VAT grouping: ignores intra-group supplies, valuable for mixed groups. Consortium relief for 5-member JV structures.
- ✓Close company planning: avoid s.455 on loans by repaying within 9 months + 1 day; convert to dividend if needed. Extraction hierarchy: pension > electric car > dividend > salary (cheapest to most expensive in tax terms).
- ✓Remuneration planning: employer NIC 13.8% above £9,100. Employer pension, ULEV cars, cycle-to-work all avoid employer NIC. OpRA (post-2017) kills most salary sacrifice benefits — exceptions: pension, cycle, ULEVs (<75g/km), legacy childcare.
- ✓Capital allowances: use full expensing (100% FYA) for new main pool P&M; allocate AIA (£1m) to SRP first. Short-life asset election for assets disposed within 8 years. SBA 3% on new commercial buildings.
- ✓R&D: maximise qualifying expenditure (staff, subcontractors 65%, consumables, software, data, cloud). Pre-April 2024: SMEs use 186% deduction; RDEC 20% above-line. Post-April 2024: merged scheme 20% RDEC-style, with R&D-intensive uplift for SMEs.
- ✓Patent Box: 10% effective rate via deduction (60% of profit for 25% main rate). Election required. Useful for UK-based IP owners. Combined with R&D relief: full innovation incentive ecosystem.
- ✓CT payment: quarterly instalments thresholds £1.5m (large — months 7/10/13/16) and £20m (very large — months 3/6/9/12) per 51% group member. 12-month exemption in first year of becoming large. IFA planning: accounting amortisation deductible; 4% fixed election available; goodwill/customer intangibles restrictions from 2015/2019.
Practice Questions
Question 1 of 8
A holding company with 4 wholly-owned trading subsidiaries (5 × 51% group companies) has CT band thresholds of:
Question 2 of 8
The optimal allocation of AIA for a company with £500k main pool (new, qualifies for full expensing) and £600k special rate pool expenditure is:
Question 3 of 8
Employer pension contributions of £20,000 for a director in a company with 25% CT rate cost the company (net of CT relief):
Question 4 of 8
A small client exemption under Chapter 10 (off-payroll working) applies when the END CLIENT meets:
Question 5 of 8
The s.455 tax on a £100,000 loan by a close company to a participator (outstanding beyond 9 months + 1 day after AP end) is:
Question 6 of 8
From April 2024, the R&D relief regime for most companies is:
Question 7 of 8
A new company becoming "large" (augmented profits > £1.5m per group member) is:
Question 8 of 8
Patent Box gives an effective CT rate on qualifying IP profits of:
Source and Version
Syllabus: ICAEW ACA Professional Level 2026 · Reviewed: 2026-05-04