Home / Methodology
This site uses deterministic formulas based on published UK tax-year thresholds and rates.
The calculator applies current corporation tax bands and marginal relief style thresholds, then layers director salary, employer NI and dividend extraction on top.
Dividend tax is estimated using the active tax year and is read together with salary income tax, employee NI and corporation tax to produce a total tax estimate.
The model is designed for planning. It does not fully model associated companies, Employment Allowance edge cases, every payroll nuance or bespoke accountant adjustments.
If you enter lower dividends than the company could pay, the remaining post-tax profit is shown as retained company cash rather than assumed extracted.
The homepage calculator is the fastest way to turn this guidance into a concrete estimate for company tax, dividends and personal take-home.
No. It is a planning calculator for business-structure and extraction decisions, not a filing system.