Two Budgets and several Spring Statements later, the UK tax system has changed more in the last 18 months than at any comparable period in the last two decades. For SMEs and owner-managed businesses, the cumulative effect is significant, and the planning response is overdue in many businesses. This piece pulls the threads together into a practical action plan.
1. Corporation tax is now genuinely material
With marginal relief biting hard between £50,000 and £250,000 of profit, owner-managers can no longer assume a flat 19% rate. The effective rate sits at 26.5% in the marginal band, and the planning levers — pension contributions, R&D claims, capital allowances, dividend timing — must all be modelled together rather than separately.
SME action: Quarterly corporation tax forecasts, not just year-end calculations. Confirmed associated company list refreshed annually.
2. Employer cost has risen materially
Employer NIC at 15% from a £5,000 threshold means the true cost of employment is higher than it has ever been in real terms. The increased Employment Allowance (£10,500) helps small employers but does nothing for businesses above its reach. Salary sacrifice into pensions is more valuable than ever; pure cash bonuses are relatively less efficient than they used to be.
SME action: Recalculate true cost of employment. Roll out or expand salary sacrifice schemes. For directors, re-run the optimal salary versus dividend versus pension model.
3. The fiscal-drag squeeze on owners and senior employees
The personal allowance and higher rate threshold remain frozen. The additional rate band starts at £125,140. The personal allowance taper between £100,000 and £125,140 creates an effective 60% marginal rate. For founders paying themselves anywhere in the £80,000–£150,000 range, pension contributions are now the dominant tax-efficient extraction lever.
SME action: Review director and senior employee compensation packages. Maximise employer pension contributions. Use Gift Aid and EIS / SEIS where appropriate.
4. CGT is no longer a quiet tax
The annual exempt amount is £3,000. Main CGT rates climbed to 18% and 24%. BADR is on a phased rise to 18% by April 2026. For business owners contemplating sale, the timing of the disposal — pre or post April 2026 — can shift the after-tax proceeds by tens of thousands of pounds.
SME action: If a business sale is on the 24-month horizon, run a BADR-rate timing analysis now. Even if completion slips, the modelling exercise is worth the effort.
5. IHT is no longer a problem for "wealthy" families only
Frozen thresholds, the £2m RNRB taper, pensions coming inside the estate from April 2027, and the £1m BPR / APR cap from April 2026 have widened the IHT net dramatically. Founders of growing businesses, AIM portfolio investors, family farms, and even middle-income London property owners are all newly affected.
SME action: Estate valuation refresh. Lifetime gifting plan. Review of pension nomination forms before April 2027. BPR / APR pre-April 2026 planning where business or agricultural assets exceed £1m.
6. The non-dom era is over
The remittance basis is gone. The four-year FIG regime, residence-based IHT, the Temporary Repatriation Facility, and rebasing options have all replaced what existed before. For internationally mobile clients — and there are many in London — the rules of the game have changed completely.
SME action: For internationally mobile founders or shareholders, a residence and FIG analysis is non-negotiable. The TRF window (2025/26 to 2027/28 at 12–15%) is a planning opportunity that won't repeat.
7. R&D claims require a higher bar
The merged scheme, mandatory Advance Notification, mandatory Additional Information Form, UK territoriality restrictions, and HMRC's active enforcement campaign have all raised the bar. The era of speculative claims and contingency-fee reclaim firms is ending — and not before time.
SME action: If you claim R&D, ensure the underlying technical narrative would survive scrutiny by an HMRC R&D inspector. If you use a contingency reclaim firm, get a Chartered Accountant second opinion before submission.
8. Capital allowances are a present from the system
Full Expensing is permanent. AIA remains at £1m. For companies investing in plant, machinery, and equipment, the cash flow benefit of 100% first-year relief is the most generous it has ever been.
SME action: Bring forward planned capex where the corporation tax saving justifies it. Run a capital allowances review on any commercial property purchased in the last five years.
9. VAT compliance is tighter than ever
The threshold is £90,000. Making Tax Digital is fully embedded. HMRC's penalty regime has been reformed and is now applied more consistently. The Flat Rate Scheme still works for genuine service businesses; the limited cost trader rules have hollowed it out for others.
SME action: Monitor the 12-month rolling threshold quarterly. Move to a fully MTD-compliant accounting system if you haven't already. Review whether the Flat Rate Scheme genuinely benefits you.
10. SDLT is reset upwards
The temporary nil-rate band is gone. The additional dwellings surcharge sits at 5%. The non-resident surcharge adds 2%. Multiple Dwellings Relief has been abolished. SDLT now demands real pre-offer modelling on any second property purchase.
SME action: Model SDLT before offer on any second home or buy-to-let. For corporate purchases, evaluate the 15% high-value flat rate alongside the rental business exemption.
What this all adds up to
The UK tax system in 2026 demands more active planning than at any point in recent memory. Reliefs that mattered are gone. Reliefs that didn't exist five years ago are now central. Effective rates depend on bands and tapers far more than headline rates. The cost of getting compliance wrong is rising as HMRC's enforcement capability grows.
For SMEs, the answer is not despair — it is engagement. Most of the changes above have planning responses. The clients who benefit most are the ones who treat their tax position as a quarterly conversation, not an annual surprise.
How PushDigits supports SMEs
We are a Chartered Accountancy firm. Every client has a named partner contact, a quarterly forecast review, an annual tax planning conversation, and an end-to-end view of corporation tax, payroll, VAT, personal tax, and capital taxes. Our offices in London and Dubai mean we support clients on both sides of the UK-UAE corridor.
If you would like a 60-minute Budget impact review of your business — covering all the points above — book a call or drop us a line. Our tax planning service includes this as standard for every retained client.