Freelance developer on £90,000

Sole Trader. Age 42. Pension preference: aggressive.

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

£60,722

Pension

£0

Effective rate

27.5%

Marginal rate

42%

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 freelance developer 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 freelance developer at £90,000 of gross, the BracketMath optimiser disagrees with at least one of those rules — that's why we built it.

Specifically: a sole trader at £90,000 of turnover often hears "you'll pay 30% in tax." The actual combined income tax + Class 4 + Class 2 figure for this row is £24,778 — an effective rate of 27.5% on turnover. The trading-allowance choice was rejected — actual expenses were larger.

The numbers, line by line

Turnover	£90,000
Taxable profits	£85,500
Trading allowance vs actual expenses	Actual expenses
Income tax	£21,632
Class 4 NI	£2,967
Class 2 NI (voluntary)	£179
Net cash (year)	£60,722
Net cash (monthly)	£5,060
Hours-equivalent at NLW (£12.21/hr)	4,973 hrs
Effective rate	27.5%
Same turnover as Ltd Co (no pension)	£59,483
Incorporate vs stay sole trader	£1,239 for staying sole trader

Why this scenario is different

Compared to the closest peer profile — Builder at £85,000 — this scenario sits £5,000 higher on gross income. That moves net cash by +£2,755, the pension contribution by +£0, and the effective rate by +0.7%. The effective rate moves only modestly — both scenarios sit inside the same binding tax band. Taxable profits change from £80,750 to £85,500 (after the trading-allowance / actual-expenses choice).

Questions this scenario raises

Should I pay voluntary Class 2 NI even if my profits are below the threshold?

Usually yes. Class 2 voluntary contributions cost £179.40/yr (£3.45/week × 52) and buy a State Pension qualifying year. The Full New State Pension as of 2026 is £230.25/wk (£11,973/yr) and you need 35 qualifying years to get the full amount. One year of voluntary Class 2 buys roughly £342 of annual State Pension at retirement — a payback period of about 6 months on first claim.

When does the £50,270 higher-rate threshold start to bite a sole trader?

Once total taxable income (trading profits + other income, after the Personal Allowance) exceeds £37,700. At that point, each £1 of additional trading profit is taxed at 40% income tax + 2% Class 4 NI = 42% combined marginal. This is also the point at which "should I incorporate?" tends to start producing a meaningful answer.

How does my PAYE day job interact with this side-hustle income?

For this row there is no separately-stacking PAYE income — the figures above are pure self-employment / contract earnings.

What expenses can I deduct as a sole trader?

"Wholly and exclusively" business costs — equipment, software, professional insurance, travel to non-permanent workplaces, training that maintains existing skills, a proportionate share of home-office costs (HMRC simplified flat rates available), and accountancy fees. Personal commuting, entertainment, training to acquire new skills, and clothing (unless protective / uniform) are not deductible.

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.

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.