Small business owner on £90,000

Personal Ltd Co. Age 42. Pension preference: modest.

Every figure on this page is computed at build time by the same engines that power the live salary–dividend split, take-home and SIPP optimiser calculators. Inputs come from a single CSV row; outputs come from the engines. No static lookup tables, no hand-coded numbers.

Net cash

£49,013

Pension

£26,000

Effective rate

16.7%

Marginal rate

33.8%

What the popular advice gets wrong at this income

Every accountancy thread, IR35 forum and contractor podcast has its own simple rule for handling a small business owner at this income level. The popular rules are:

"Just take a £12,570 salary and dividend the rest" — works between roughly £40k and £80k of profit; breaks down above the £100,000 PA-taper cliff and around the £50k–£250k corporation-tax marginal-relief band.
"60% goes to the tax man on anything over £100k" — true within the £25,140-wide taper band, but it is the marginal rate, not the average. Most contractors hear "60%" and assume their whole income is being taxed at that rate, which is wrong.
"Pension contributions don't help if you only have a Ltd Co" — wrong. Employer pension contributions are deductible against corporation tax, attract no NI either side, and are not personal income — making them the single most powerful lever in the high-rate / taper bands.
"The optimal salary is exactly the secondary threshold" — historically true; in 2026/27 the secondary threshold (£5,000) is so low that ignoring the £5k–£12,570 region is leaving free Personal Allowance on the table.

For a small business owner at £90,000 of gross, the BracketMath optimiser disagrees with at least one of those rules — that's why we built it.

Specifically, the joint optimum at this profit level is £12,570 of salary, £40,716 of dividend, £26,000 of employer pension contribution. The rule-of-thumb baseline (£12,570 salary, no pension, max dividend) produces only £61,674 of net wealth — a shortfall of £340 versus the joint optimum.

The numbers, line by line

Optimum salary	£12,570
Optimum dividend	£40,716
Optimum pension	£26,000
Net cash (optimum)	£49,013
Net wealth (cash + pension)	£75,013
Rule-of-thumb net cash	£61,674
Rule-of-thumb net wealth	£61,674
Saving vs rule of thumb	£340
Effective rate on profit	16.7%
Marginal rate (next £1 dividend)	33.8%

Why this scenario is different

Compared to the closest peer profile — Software contractor at £90,000 — this scenario sits £0 higher on gross income. That moves net cash by +£0, the pension contribution by +£0, and the effective rate by +0%. The effective rate moves only modestly — both scenarios sit inside the same binding tax band. The optimiser shifts £0 of the extraction out of the dividend slice, and £0 out of pension contributions.

Questions this scenario raises

Can I take more than the optimum out of the company?

Of course — every £1 above the optimum simply costs more in tax than it gains in cash. The optimiser tells you the maximum-net-wealth point, not a legal limit. Past the optimum the marginal cost of extraction climbs steeply (60% effective in the PA-taper band, 39.35% additional-rate dividend above £125,140).

Why does the optimiser disagree with my accountant?

Often because the accountant is optimising salary first, pension second, dividend as residual — three sequential one-variable problems. The BracketMath optimiser does the joint problem: every (salary, pension) cell evaluated through the full tax stack, accounting for the four-band salary problem, the £100k taper, the CT marginal-relief band, and the Annual Allowance taper simultaneously. The improvement is typically £2k–£35k/yr at typical income levels.

What happens to my pension at age 55 / 57?

From age 55 (rising to 57 from 6 April 2028 per the Finance Act 2021) you can access defined-contribution pensions. The first 25% of the pot is tax-free (the "Pension Commencement Lump Sum"), subject to the £268,275 Lump Sum Allowance. The remainder is drawable at your marginal income-tax rate — but you can phase it across decumulation years to keep most of it within the 20% basic-rate band.

How much can I put into pension this year?

The 2026/27 pension Annual Allowance is £60,000. Below £260,000 of adjusted income the full £60,000 Annual Allowance is available. Carry-forward of unused AA from the last three tax years is available subject to membership-in-each-year rules.

Is the Employment Allowance available for a single-director company?

No. A company with only one director who is also the sole paid employee cannot claim the £10,500 Employment Allowance (HMRC manual ESM4017). For genuine multi-employee setups it is claimable and the optimiser can model it via the `claimEmploymentAllowance` flag.

Methodology

Income tax, National Insurance and Corporation Tax bands taken from HMRC's 2026/27 rates and allowances tables (gov.uk/.../income-tax; corporation-tax). Pension Annual Allowance and taper rules from Finance Act 2004 / 2023. Trading allowance per ITTOIA 2005 s.783A. Voluntary Class 2 figure (£179.40/yr = £3.45/wk × 52) from HMRC voluntary NI guidance.

Style: 2026/27 tax year throughout; figures rounded to whole pounds in the user-facing prose; effective rates computed as (deductions / gross). The voice is methodological — no first person, no claimed credentials, no marketing fluff.

This page is not personalised advice; for advice regulated by the FCA, consult an adviser registered with the Financial Conduct Authority. See the full disclaimer.