Teacher on £35,000

Sole Trader. Age 34. Plus £8,000 of other personal income stacking below. 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

£27,206

Pension

£0

Effective rate

17.3%

Marginal rate

26%

Step by step: how the engine arrived at the bottom line

For a sole-trader teacher with £35,000 of turnover, the engine evaluated each stage of the Self Assessment chain in HMRC's order:

Turnover: £35,000.
Expense vs trading-allowance decision: the £1,000 trading allowance (ITTOIA 2005 s.783A) lost to actual expenses and was discarded.
Taxable profits: £33,250.
Income tax: £4,624 (rUK bands, after Personal Allowance).
Class 4 NI: £1,241 (6% £12,570–£50,270, 2% above).
Class 2 (voluntary): £179 — £179.40/yr, paid to maintain a State Pension qualifying year per HMRC's voluntary NI guidance.
Net cash: £27,206. Effective rate on turnover: 17.3%.

The numbers, line by line

Turnover	£35,000
Taxable profits	£33,250
Trading allowance vs actual expenses	Actual expenses
Income tax	£4,624
Class 4 NI	£1,241
Class 2 NI (voluntary)	£179
Net cash (year)	£27,206
Net cash (monthly)	£2,267
Hours-equivalent at NLW (£12.21/hr)	2,228 hrs
Effective rate	17.3%
Same turnover as Ltd Co (no pension)	£25,838
Incorporate vs stay sole trader	£1,368 for staying sole trader

Why this scenario is different

Compared to the closest peer profile — Freelance developer at £35,000 — this scenario sits £0 higher on gross income. That moves net cash by −£488, the pension contribution by +£0, and the effective rate by +1.4%. The effective rate moves only modestly — both scenarios sit inside the same binding tax band. Taxable profits change from £33,250 to £33,250 (after the trading-allowance / actual-expenses choice).

Questions this scenario raises

What tax year do these figures use?

2026/27 UK tax year (6 April 2026 – 5 April 2027), England, Wales and Northern Ireland rates. Scottish tax bands are not modelled in this calculation — Scotland has a separate Starter / Basic / Intermediate / Higher / Advanced / Top band schedule that will be added in a future batch.

Where does the BracketMath engine source its rates?

Income tax / NI / CT / dividend rates come from HMRC's published 2026/27 rate tables (gov.uk/government/publications/rates-and-allowances-income-tax). Pension rules come from FA 2004 and the FCA's consumer guidance. Historical investment returns used in the Monte Carlo engine come from a 125-year UK gilt + UK equity series stored in src/data/historical-returns.json. Every constant carries a source URL in the source code.

How does the £1,000 trading allowance interact with rental income?

They are separate allowances. There is a £1,000 trading allowance for trading income and a separate £1,000 property allowance for rental income, both under FA 2017. You can claim both in the same year if you have both income streams.

Should I incorporate this sole-trader business into a Ltd Co?

At this turnover, the pure-tax saving from incorporating is only £0/year — almost certainly less than the ~£800–£1,500/yr accountancy and admin overhead of running a Ltd Co. Stay a sole trader unless turnover scales materially.

Are the numbers on this page computed live or pre-rendered?

They are pre-rendered at build time by running the BracketMath engine code against the inputs for this specific row. That means: zero JavaScript on the page for the calculation itself, the figures cannot drift if the engine is changed, and you can verify them by running the corresponding calculator with the same inputs.

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.