Gross pay
Enter income the way payroll works
Add recurring or one-off income, choose the period, and keep taxable, NIable and pension assumptions close to the result they affect.
taxonpay.co.uk
TaxOnPay
Plan UK take-home pay, PAYE history, salary changes and tax scenarios before they hit your payslip.
TaxOnPay brings gross-to-net, net-to-gross, pensions, car schemes, student loans, child benefit, tax optimisation, snapshots and scenario comparison into one native iPhone app.
Built for UK payroll planning, pay-change decisions, pension tuning and local-first estimate workflows.
Current fiscal policy coverage: 2024/25, 2025/26 and 2026/27.
TaxOnPay provides estimates for planning and comparison. It is not tax, financial, legal, payroll, pension, employment or accounting advice.
Planning tools
Answer the pay questions that matter
Use the same calculation engine across quick estimates, target salary planning, optimisation and saved comparisons, so your scenarios stay consistent.
Pensions and deductions
Model pre-tax choices before changing them
Review pension, salary sacrifice, qualifying earnings, total pensionable pay, one-off pension and post-tax effects so you can understand how each choice changes take-home pay.
Scenarios
Compare saved setups side by side
Save different versions of your setup, inspect changed inputs, share a scenario summary, and compare take-home pay, gross pay, pre-tax allocations and deductions by week, month or year.
Pay change
Check a raise against inflation
Compare proposed pay changes with CPI or CPIH, switch between percentage and pounds inputs, and estimate the personalised take-home impact using your selected profile settings.
Gross to net
Estimate target salary and take-home outcomes
Use gross-to-net, net-to-gross and projection tables to compare offers, plan salary targets, copy or apply results, and understand how much of a change reaches your payslip.
Latest app features
Smarter planning for complicated pay
The current iOS app goes beyond a single payslip estimate, with tools for marginal rates, allowance taper pressure, scheme changes and messy PAYE histories.
Choose the optimisation goal
Reduce marginal deductions, target an overall deduction percentage, or protect income around the Personal Allowance taper near £100k.
Test contribution levers
Compare recurring pension, one-off pension and other pre-tax levers with recommendation output for take-home change, estimated tax saved and projected marginal rate.
Add company car impacts
Model supported car schemes as salary sacrifice or benefit-in-kind entries, with periodic amounts that flow into the same calculation engine.
Freeze, compare and revert
Take a snapshot before experimenting, review changed inputs, and revert individual values without rebuilding the whole setup.
Start from gross or net pay
Use guided setup for gross-income or net-income starting points, then keep profile-specific tax region, fiscal year, loan and pay assumptions.
Account for prior months
Use tax month, previous year-to-date taxable pay and previous year-to-date tax paid for PAYE-style estimates after bonuses or job changes.
Payroll detail
Built around real UK pay inputs
TaxOnPay keeps the everyday details close to the calculation, from student loan plans and child benefit to PAYE history and recurring or one-off income.
Included in core planning
- Income Tax, National Insurance, tax code and tax region
- Student and postgraduate loan repayments
- Pension contributions, salary sacrifice, employer matching and one-off pension contributions
- Child Benefit and High Income Child Benefit Charge inputs
- Recurring income, one-off income, pensionable income and benefits in kind
- Pre-tax and post-tax deductions with money or time-hours input modes
Useful when pay gets messy
- PAYE tax month, previous YTD taxable pay and previous YTD tax paid
- Scenario snapshots, changed-input review and shareable scenario summaries
- Multiple profiles with setup from known gross pay or known net pay
- Car scheme and benefit-in-kind modelling where supported by the selected fiscal year
- ONS CPI and CPIH inflation data for pay-change comparisons
- Local-first storage for profiles, scenarios, settings and calculation inputs
Pay Change focuses on selected recurring gross pay and personalised take-home estimates. Some variable items, bonuses and one-off arrangements are intentionally excluded from that tool and can still be modelled elsewhere in the app.
App Store release
A UK pay lab for iPhone
TaxOnPay is now available on the App Store. Download the iPhone app to plan UK take-home pay, pensions, deductions, salary changes and saved scenarios.
Support and legal
Support
Use this page for App Store support and release questions. Please avoid sending real payslips, National Insurance numbers, tax codes or salary details unless they are anonymised.
Contact
Email support requests to support@taxonpay.co.uk.
Include your iPhone model, iOS version, app version, and the steps needed to reproduce the issue.
Open support pagePrivacy
TaxOnPay is local-first and does not require an account. Review what is stored on device and how optional analytics works.
Read privacy policyLimitations
TaxOnPay provides estimate and planning tools. It is not payroll, accounting, tax, legal or financial advice.
Read terms and limitations