Finance contractor on £198,000

Inside-IR35 Umbrella. Inside IR35. Age 44. 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

£89,841

Pension

£29,700

Effective rate

39.6%

Marginal rate

42%

The £100,000 cliff catches almost every higher-earning contractor

Before the numbers, a warning: a finance contractor at £198,000 of gross umbrella contract value for 2026/27 is sitting close to one of the UK tax code's sharpest cliffs.

This row sits above the £125,140 boundary at which the Personal Allowance is fully eroded. The taper trap is behind you, but the additional-rate threshold (45% income tax / 39.35% dividend tax) is now in play. The next £1 of dividend is taxed at the additional-rate dividend rate of 39.35% — which makes pension contributions (still 0% at the company-contribution level) disproportionately valuable, subject to the £60,000 Annual Allowance and its £260,000 tapered version.

The numbers for this specific scenario

Bottom line for a finance contractor at £198,000 of gross income: net cash £89,841; pension £29,700; effective rate on gross 39.6%.

The numbers, line by line

Day rate	£900
Contract value (220 days)	£198,000
Inside-IR35 net cash	£89,841
Inside-IR35 pension	£29,700
Outside-IR35 net cash	£95,688
Outside-IR35 pension	£29,500
Cost of being inside IR35 (net wealth)	£5,647
Break-even outside-IR35 day rate	£969

Why this scenario is different

Compared to the closest peer profile — Software contractor at £187,000 — this scenario sits £11,000 higher on gross income. That moves net cash by +£4,212, the pension contribution by +£1,650, and the effective rate by +0.4%. The effective rate moves only modestly — both scenarios sit inside the same binding tax band. The break-even outside-IR35 day rate moves from £922 to £969 per day.

Questions this scenario raises

Are charity donations modelled?

No, not directly. Gift Aid donations reduce adjusted net income (extending the basic-rate band) and are a legitimate way to reclaim the £100k taper marginal. The BracketMath engine does not model them automatically; subtract the gift-aided amount from the "other income" field if you want a closer match.

How do I model my partner's income alongside mine?

BracketMath models a single tax entity — there is no joint-couple calculation. For couples, the practical approach is to run each partner separately and consider income-splitting strategies (employing the lower-earning spouse for genuine work performed, sharing dividends if both are shareholders, etc). The Ltd Co spousal share pattern is sketched in /guides/ltd-company-director-tax.

Why do some columns of the table use cash and others use net wealth?

Net cash is the £ that arrive in your bank account. Net wealth includes pension contributions valued at face (£1 of pension = £1 of wealth, since it will eventually be spent — possibly at a lower marginal rate than today). The optimiser uses a `pensionWeight` parameter so the user can adjust the weight; this page sets it according to the row's `pensionPref` (0 / 0.5 / 1.0 for none / modest / aggressive).

What is the "deemed salary" inside IR35?

It is the figure the umbrella treats as your gross salary after deducting its own fee and employer NI from the contract value. Inside IR35, the contractor does not legally have a separate Ltd Co — the relationship is, for tax purposes, "deemed employment." The deemed salary is what PAYE income tax and employee NI are calculated on.

Is this calculation valid for the 2027/28 tax year?

Only partially. Thresholds (PA, basic-rate, higher-rate, NI thresholds) are frozen through April 2028 per the Autumn Budget 2024. Some rates may change at the Spring 2027 Budget. The figures here are accurate for 2026/27 and will be re-run after any future Finance Act changes — check the published-date footer of this page.

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.