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As of 13 August 2026, AI can work out your salary after tax.
Most people should do this themselves; the prompt is on this page.
Can you do it?
5 minutesto a draft.
15 minutesto something you’d act on.
Cost, all in£0
Skill needednone
Who has to check ityou
What the alternative costsNo priced alternative is provided in the available tools data.
If this goes wrong: you budget using the wrong take-home figure and need to correct your plans when the official calculator or payslip differs.
What to actually do
Do it yourself
The route this page recommends
A chat interface, no skill needed, and roughly 15 minutes until you can act on the result.
How to actually do it
- Open your employment offer or latest payslip and record your gross pay, pay frequency, tax code and National Insurance category if shown.
- Gather your pension contribution, salary sacrifice arrangements, taxable benefits, bonus details and any student loan plan from your payroll or benefits records.
- Paste the prompt into a chatbot and replace each bracketed slot with your figures, writing "unknown" where you do not have the information.
- Ask the chatbot to calculate both the annual estimate and the amount for each pay period, with a separate result for every unknown input rather than an invented figure.
- Open the GOV.UK income tax and take-home pay calculators and enter the same salary, tax region, tax code, pension and student loan details.
- Compare the chatbot's deductions and net pay with the GOV.UK result, then use your first payslip to correct any difference before relying on the figure for a budget.
Prompt
Work out my estimated UK take-home pay from the information below. Use the current UK tax and National Insurance rules available on 2026-08-13, but do not invent missing rates or assumptions. If you cannot confirm a rule, say so and tell me what to check on GOV.UK. My details: - Gross salary: [£ amount and whether it is annual, monthly, weekly or hourly] - Country where I pay income tax: [England, Wales, Scotland or Northern Ireland] - Pay frequency: [monthly, weekly or other] - Tax code: [code, or unknown] - Employee pension contribution: [percentage or £ amount, and whether salary sacrifice] - Student loan: [none, Plan 1, Plan 2, Plan 4, Plan 5 or postgraduate loan] - Other salary sacrifice or taxable benefits: [details or none] - Bonus, commission or irregular pay: [details or none] - National Insurance category, if known: [category or unknown] Show the calculation in a table with gross pay, income tax, employee National Insurance, pension, student loan deduction and estimated net pay. State every assumption, distinguish annual and per-pay-period figures, and give a separate result if an input is unknown rather than guessing. Then list the exact inputs I should confirm using my latest payslip and provide the relevant GOV.UK calculator or guidance page to check the estimate. This is budgeting information, not professional advice, and it must not be treated as a tax filing calculation.
Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.
Use a tool built for this
Second choiceHand it to a person
The distant thirdA person who owns the outcome does this end to end, worth it when the failure is dear.
What it gets wrong
- It cannot know whether your employer has entered your tax code, pension treatment or benefits correctly.
- It cannot see HMRC's live record or predict an emergency tax code and payroll correction with certainty.
- It cannot infer missing student loan, salary sacrifice or taxable benefit details without risking a wrong estimate.
- It cannot guarantee that a future payslip will match the estimate when your pay, tax code or deductions change.
Even on a YES, the friction has a name: real time truth and context depth.
How we scored this
Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.
| Axis | Score (0–2) |
|---|---|
| Output | 2 |
| Inputs | 2 |
| Verification | 2 |
| Liability | 2 |
| Effort delta | 2 |
| Total | 10 / 10 |
The methodology and its thresholds are published in full.
FAQ
- Can ChatGPT calculate my take-home pay?
- Yes. Give it your gross pay, tax region, pay frequency, tax code and deductions, and it can produce an estimated take-home figure. Check the result against a GOV.UK calculator and your payslip.
- What information do I need to work out my salary after tax?
- You need your gross pay and pay frequency, plus your tax code, tax region, pension contribution, student loan plan and any salary sacrifice or taxable benefits. Your latest payslip usually contains much of this information.
- Is an AI salary calculator accurate in the UK?
- It can be accurate when the inputs and current UK rules are correct, but it may use stale rates or miss payroll details. Compare it with the GOV.UK calculator and treat the payslip from your employer as the practical check.
- Can AI tell me how much tax I should pay?
- It can estimate income tax and National Insurance for a stated set of circumstances, but it cannot confirm HMRC's live record or your employer's payroll setup. This is not professional advice; speak to an accountant or tax adviser if the amount is material, disputed or unusually complicated.
Nearby answers
Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.
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