UK finance and tax planning

This hub collects take-home pay sketches, sole trader and dividend models, and adjacent invoice helpers alongside respectful Zakat arithmetic and Australian GST splits. Every page states limits up front: bands, allowances, and filing rules change, so treat outputs as conversation starters with a qualified accountant or advisor, not filings.

Pair calculators with the guides below for worked examples, comparison tables, and long-tail FAQs. For broader US-focused calculators, use the main finance directory.

When to use which UK sketch

Mixed earners often need three different lenses in one afternoon: PAYE-style take-home, sole trader profit after blended tax and NI percentages, and distribution planning after an effective dividend rate. The table maps typical questions to a starting tool; always align inputs with your latest HMRC or payroll pack.

Scenario	Start here	Why
Employee or contractor with PAYE-style deductions	Salary after tax (UK)	Applies published 2026/27 Income Tax bands, employee NI, optional pension, salary sacrifice and student loan.
Buying a home in England, Scotland or Wales	Stamp duty (UK)	One calculator with SDLT, LBTT and LTT modes, first-time and additional-property rules, and cash required.
Sole trader profit after blended rates	Self-employed tax (UK)	Uses a single effective tax plus NI percentage you pull from forecasts or your accountant.
Director distributions after an effective dividend rate	Dividend tax (UK)	Stacks allowances into the percentage you enter; pair with salary tool when mixing income types.
Pricing retained days from an annual after-tax goal	Freelance day rate	Turns target net income and billable days into a floor day rate before discounts.

Guides with worked examples

Long-form explainers that pair with the calculators in this hub. Open a post, then return here to plug in your own numbers.

Tools in this cluster

Salary After Tax Calculator UK

Estimate UK PAYE take-home pay for 2026/27.

Stamp Duty Calculator UK

Estimate SDLT, LBTT or LTT from price and buyer type.

Self Employed Tax Calculator UK

Sketch take-home profit after income tax and NI percentages.

Dividend Tax Calculator UK

Estimate net dividends after an effective dividend tax rate.

Freelance Day Rate Calculator

Turn annual income targets and billable days into a minimum day rate.

Invoice Late Fee Calculator (Simple Interest)

Estimate late fees from principal, days overdue, and annual rate.

GST Calculator Australia (10%)

Add or remove 10% Australian GST on amounts.

Zakat Calculator (2.5% above Nisab)

Estimate Zakat due when zakatable wealth exceeds your chosen nisab threshold.

Hub FAQs

Are these HMRC-certified calculators?: No. The PAYE take-home and stamp duty tools apply published 2026/27 bands as a planning estimate. Use HMRC payroll software, the official SDLT calculator, Revenue Scotland, or Welsh Revenue Authority tools before you file or exchange.
Why list Australia GST and Zakat on a UK hub?: Teams and households often span geographies. Keeping respectful Zakat arithmetic and Australian GST splits nearby reduces fragmented searches while each tool page still carries its own disclaimers and intent.
Where should I go for business metrics outside tax?: Use the business growth directory for ROAS, churn, CAC, and break-even calculators that complement finance planning decks.

Developer utilities live in the developer tools hub. Converters and SLAs live under utilities and converters.