London-based accountancy, tax and business support for UK and international clients.Client login · Resources · Start enquiry
Accountants4All logo

Home / Resources / Calculators

Detailed estimate tools

Model the whole situation, not just one headline number.

Choose the relevant tax year or accounting period, add the income streams or VAT scheme that actually applies, and review the workings before using the estimate for planning.

Salary / PAYE VAT & schemes Self Assessment Corporation Tax Dividends Savings interest Rental property Sole trader Mileage

Employment

Salary, PAYE & take-home calculator

Annual planning view with tax year, region, tax-code basis, NI category, pension method, student loans and employer NI.

Salary
Tax year
Tax region
Income amount (£)
Income frequency
Hours per week
Bonus / taxable cash extras (£/year)
Calculation basis
Tax code
NI category
Pension method
Pension input
Your pension contribution
Student loan
Postgraduate loan
Gross pay—
Income Tax—
Employee NI—
Pension from take-home—
Student loans—
Annual take-home—
Monthly average—
Weekly average—
Employer NI—
Total employer cost—
Hourly take-home—
Effective deductions—

Official basis: HMRC PAYE / NI rates and thresholds. This is an annual planning estimate, not payroll software.

VAT

VAT, Flat Rate Scheme & retail schemes

Choose the scheme first. The form changes to match standard VAT, Flat Rate, Point of Sale, Apportionment or Direct Calculation.

VAT
VAT method
VAT period start
VAT period end

Standard VAT return estimate

Net sales at 20% (£)
Net sales at 5% (£)
Zero-rated sales (£)
Exempt / outside scope (£)
Recoverable input VAT (£)
Other VAT adjustments (+/- £)
VAT method / rate—
Output / scheme VAT—
Input VAT / credits—
Estimated VAT due—
Net amount / taxable base—
Gross / takings—
Typical return/payment deadline—
Limited-cost test—

Retail scheme calculations are estimates of output VAT only and assume the inputs have already been classified correctly.

Personal tax

Self Assessment multi-income estimator

Combine employment, self-employment, rental, savings, dividends, pension and other taxable income in one tax-year calculation.

Self Assessment
Tax year
Tax region
Salary / employment (£)
Pension / other earned income (£)
Self-employment turnover (£)
Self-employment expenses (£)
Rental gross income (£)
Rental allowable running costs (£)
Residential finance costs (£)
Savings interest (£)
Dividend income (£)
Other taxable income (£)
Other confirmed deductible reliefs (£)
Gross relief-at-source pension (£)
Gross Gift Aid donations (£)
Tax already deducted / PAYE (£)
Student loan
Postgraduate loan
Total gross income—
Personal Allowance—
Income Tax before property credit—
Property finance-cost tax reduction—
Income Tax after credit—
Class 4 NI—
Student / postgraduate loans—
Estimated amount still due—
1st payment on account—
January cash requirement—
2nd payment on account—
SA payment dates—

This is a planning computation. It does not model every relief, loss, benefit, High Income Child Benefit Charge, pension annual allowance, foreign tax credit, CGT, partnership allocation or specialised property rule.

Limited companies

Corporation Tax & marginal relief calculator

Uses the actual accounting-period dates, associated-company adjustment and augmented profits.

Corporation Tax
Accounting period start
Accounting period end
Taxable profits (£)
Exempt distributions received (£)
Associated companies incl. this company
Accounting-period days—
Augmented profits—
Adjusted lower limit—
Adjusted upper limit—
25% before marginal relief—
Marginal relief—
Corporation Tax due—
Effective rate—
Basis—
Normal payment date—
CT600 filing deadline—

Large and very large companies can have quarterly instalment payment rules. Ring-fence profits, R&D, losses, group relief, chargeable gains and other CT600 adjustments are outside this estimator.

Investments & dividends

Dividend tax calculator

Stacks dividends on top of salary, self-employment and other income for the selected tax year.

Dividends
Tax year
Salary / earned income (£)
Savings interest (£)
Other taxable income (£)
Dividend income (£)
Dividend allowance—
Dividends taxed above 0%—
Dividend tax—
Effective dividend tax rate—

Savings

Savings interest tax calculator

Includes unused Personal Allowance, the starting rate for savings and Personal Savings Allowance.

Interest
Tax year
Non-savings income (£)
Savings interest (£)
Dividend income (£)
Starting-rate amount at 0%—
Personal Savings Allowance—
Interest taxed above 0%—
Tax on savings interest—

Landlords

Rental-property income tax calculator

Models gross rent, allowable costs, optional property allowance, residential finance costs and other income.

Rental
Tax year
Tax region
Gross rent (£)
Allowable running costs (£)
Residential finance costs (£)
Other non-savings income (£)
Taxable property profit—
Finance-cost tax reduction—
Estimated tax attributable to rent—
Rent after costs & tax estimate—

Property allowance and residential finance-cost rules have eligibility limits and exceptions. Capital expenditure, losses, Rent a Room, furnished holiday letting transitions and jointly owned property need separate review.

Self-employed

Sole trader tax & NI calculator

Turnover less allowable costs, optional trading allowance, business mileage, other PAYE income and Class 4 NI.

Sole trader
Tax year
Tax region
Turnover (£)
Allowable expenses (£)
Business miles — car/van
Other PAYE / pension income (£)
Mileage deduction—
Taxable trading profit—
Income Tax attributable—
Class 4 NI—
Total tax + Class 4 estimate—
Trading cash after entered costs & estimate—

Business travel

Approved mileage amount calculator

Uses the tax-year-specific HMRC approved mileage rates.

Mileage
Tax year
Vehicle
Business miles
Eligible passengers (car/van only)
Passenger business miles
First-band rate—
First-band amount—
Additional mileage amount—
Passenger amount—
Total approved amount—
Important calculator disclaimer

These calculators are detailed planning estimators, not filing software. A correct tax return or payroll calculation can depend on facts not captured here, including residence, remittance basis or FIG rules, benefits, coding adjustments, losses, capital allowances, pension limits, group structure, loans, reliefs and anti-avoidance provisions. Always check the relevant period against current HMRC guidance before filing or acting.