Data scientist contractor on £115,000

Personal Ltd Co. Outside IR35. Age 34. 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

£43,136

Pension

£60,000

Effective rate

10.3%

Marginal rate

8.8%

What a data scientist contractor on £115,000 of company profit actually takes home

A data scientist contractor running a personal Ltd Co with £115,000 of profit before director pay (2026/27 rUK rates) can extract that profit as some mix of salary, dividend and employer pension. The joint optimum — the combination that produces the highest net wealth — pays £12,570 as salary, £33,449 as dividend and £60,000 as an employer pension contribution. Total tax + NI through the chain comes to £11,864 — an effective rate of 10.3% on company profit.

The "rule of thumb" baseline — £12,570 salary, no pension, max dividend — leaves £29,288 on the table at this profit level. That gap is the value of solving the four-band salary problem (LEL / PT / ST / £12,570) jointly with the pension decision rather than picking each one independently.

The five tax lines that produce the optimum

Corporation tax: £7,846 on £41,295 of post-pay profit.
Employer NI: £1,136 on the £12,570 salary (15% above the £5,000 Secondary Threshold).
Employee NI: £0 on the same salary (8% main band, 2% above £50,270).
Income tax: £0 on the salary (rUK bands, after personal allowance).
Dividend tax: £2,883 on the £33,449 dividend (8.75% / 33.75% / 39.35% bands, stacked above salary).

Net cash to the director: £43,136. Pension contribution (locked until age 55, rising to 57 from 6 April 2028 per the Finance Act 2021): £60,000. Net wealth on the all-£1-is-equal view: £103,136.

The numbers, line by line

Optimum salary	£12,570
Optimum dividend	£33,449
Optimum pension	£60,000
Net cash (optimum)	£43,136
Net wealth (cash + pension)	£103,136
Rule-of-thumb net cash	£73,847
Rule-of-thumb net wealth	£73,847
Saving vs rule of thumb	£29,288
Effective rate on profit	10.3%
Marginal rate (next £1 dividend)	8.8%

Why this scenario is different

Compared to the closest peer profile — Software contractor at £110,000 — this scenario sits £5,000 higher on gross income. That moves net cash by +£3,696, 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. The optimiser shifts £4,050 of the extraction into the dividend slice, and £0 out of pension contributions.

Questions this scenario raises

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.

Why does the page link to specific other professions?

The five linked pages at the bottom are computed by a similarity metric over (profession, income, structure, age band) — the closest five neighbours in that space, not the same five pages every row links to. The aim is a genuine cross-link graph rather than a star pattern that search engines correctly read as a pSEO signal.

Should I take dividends now or wait until next tax year?

Tax-year-end timing matters: a dividend declared in March 2027 is taxed at 2026/27 rates; one declared in April 2027 falls into 2027/28 (potentially still in the same calendar year). If your 2026/27 personal income is bunched in basic-rate territory and 2027/28 will be in higher-rate, accelerate. If the reverse, defer. The mathematical structure is "level the tax-band utilisation across years if income is volatile."

Are dividend tax rates rising in 2026/27?

No — the 8.75% / 33.75% / 39.35% rates were set in 2022 and have been held flat through 2026/27. The Dividend Allowance has been reduced from £2,000 (2022/23) to £500 (2024/25 onwards) which has the same effect as a ~£175 tax rise at any rate band. This figure is built into every dividend-related calculation on the site.

How does the Pension Annual Allowance taper work?

Above £260,000 of adjusted income, the £60,000 Annual Allowance reduces by £1 for every £2 over the threshold, down to a £10,000 floor at £360,000 of adjusted income. The taper bites later than the £100k Personal Allowance taper but is similarly punitive on pension contributions specifically.

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.