Freelance writer on £20,000

Sole Trader. Age 30. Pension preference: none.

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

£17,149

Pension

£0

Effective rate

9.3%

Marginal rate

26%

The four tax mechanisms acting on this income

For a freelance writer at £20,000 of gross income on the sole-trader route in 2026/27, four mechanisms determine the bottom line:

The Personal Allowance — £12,570 of income at 0% income tax. This row sits below £100,000 of adjusted net income, so the full £12,570 PA is available.
The £50,270 higher-rate threshold — income tax jumps from 20% to 40% above this number. Dividend tax simultaneously jumps from 8.75% to 33.75%.
National Insurance — at Class 4 rates of 6% (£12,570–£50,270) and 2% (above £50,270) on profits, plus the optional £179.40 Class 2 contribution to maintain a State Pension qualifying year.
The trading allowance — £1,000 flat deduction available in lieu of actual expenses (ITTOIA 2005 s.783A). The engine picks whichever produces lower taxable profits.

Run those four mechanisms in sequence and the bottom line for this row is £17,149 of net cash, against £1,851 of taxes / NI / fees lost through the chain — an effective rate of 9.3%.

The numbers, line by line

Turnover	£20,000
Taxable profits	£19,000
Trading allowance vs actual expenses	Actual expenses
Income tax	£1,286
Class 4 NI	£386
Class 2 NI (voluntary)	£179
Net cash (year)	£17,149
Net cash (monthly)	£1,429
Hours-equivalent at NLW (£12.21/hr)	1,404 hrs
Effective rate	9.3%
Same turnover as Ltd Co (no pension)	£16,527
Incorporate vs stay sole trader	£622 for staying sole trader

Why this scenario is different

Compared to the closest peer profile — Freelance designer at £25,000 — this scenario sits £5,000 lower on gross income. That moves net cash by −£3,515, the pension contribution by +£0, and the effective rate by −3.1%. The shift in effective rate is large enough that the binding tax constraint has changed — probably crossing a band boundary. Taxable profits change from £23,750 to £19,000 (after the trading-allowance / actual-expenses choice).

Questions this scenario raises

Does it include Scottish income tax?

No. Scotland has its own income-tax band schedule (Starter 19% / Basic 20% / Intermediate 21% / Higher 42% / Advanced 45% / Top 48% for 2026/27). National Insurance and corporation tax are still set at UK-wide rates. A Scotland-specific batch of programmatic pages is planned but is not in this batch.

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.

Why is the effective rate lower than the headline tax brackets?

Because the headline 20% / 40% / 45% rates apply only to the income slice in each band — not the whole income. The Personal Allowance shelters the first £12,570 at 0%; the basic-rate band only charges 20% on the next £37,700; and so on. The effective rate on the entire income is the weighted average of every slice — typically much lower than the headline number people quote.

Is the figure on this page net of accountancy fees?

Yes when relevant — the take-home calculator deducts an umbrella fee for inside-IR35 rows (£1,500/yr assumed) and the optimiser allows for an arbitrary annual business expense pot (£3,500/yr default for Ltd Co rows). Sole-trader rows assume the higher of £800/yr or 5% of turnover as actual business expenses, which approximates a low-overhead service business.

What if I have rental income alongside this self-employment?

Add it to the `otherIncome` field of the calculator. Property income is taxed at non-savings, non-dividend rates (so stacks alongside salary in the band schedule). The first £1,000 of rental income can also be sheltered by the separate Property Allowance under FA 2017 s.16.

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.