HMRC can account for savings, other income, reliefs, code adjustments and the complete tax-paid history that this restricted estimate does not include.
Tax Refund Calculator UK
Enter your values below to get the result first, then scroll for the full explanation and guidance.
Potential annual Income Tax overpayment
£514.00Paid more than estimated liability
Potential annual Income Tax overpayment: £514.00 (Paid more than estimated liability)
This compares full-year Income Tax paid or projected with estimated 2026/27 annual liability on one ordinary non-savings income amount. It is not an HMRC refund decision.
Annual comparison
This compares full-year Income Tax paid or projected with estimated 2026/27 annual liability on one ordinary non-savings income amount. It is not an HMRC refund decision.
Result snapshot
A quick visual read of the values behind this result.
Annual income£30,000.00
Full-year Income Tax paid or projected£4,000.00
Estimated annual Income Tax£3,486.00
Estimated shortfall if any£0.00
Recommended next checks
- →Check your P60 or HMRC tax calculation for actual tax paid and all income sources.
- →Use HMRC's refund process if the final tax-year calculation confirms an overpayment.
- Annual income
- £30,000.00
- Full-year Income Tax paid or projected
- £4,000.00
- Estimated annual Income Tax
- £3,486.00
- Estimated shortfall if any
- £0.00
Use a full-year tax-paid amount, not deductions to date. Standard allowance only; excludes savings, dividends, reliefs, non-standard codes and prior-year adjustments. HMRC confirms refunds after year-end.
Try different values to compare results.
This calculator compares full-year 2026/27 Income Tax paid or projected with a narrow annual liability estimate. Do not use only deductions to date. HMRC has not approved the result for refund.
Potential annual Income Tax overpayment
£514.00Paid more than estimated liability
Potential annual Income Tax overpayment: £514.00 (Paid more than estimated liability)
This compares full-year Income Tax paid or projected with estimated 2026/27 annual liability on one ordinary non-savings income amount. It is not an HMRC refund decision.
Annual comparison
This compares full-year Income Tax paid or projected with estimated 2026/27 annual liability on one ordinary non-savings income amount. It is not an HMRC refund decision.
Result snapshot
A quick visual read of the values behind this result.
Annual income£30,000.00
Full-year Income Tax paid or projected£4,000.00
Estimated annual Income Tax£3,486.00
Estimated shortfall if any£0.00
Recommended next checks
- →Check your P60 or HMRC tax calculation for actual tax paid and all income sources.
- →Use HMRC's refund process if the final tax-year calculation confirms an overpayment.
- Annual income
- £30,000.00
- Full-year Income Tax paid or projected
- £4,000.00
- Estimated annual Income Tax
- £3,486.00
- Estimated shortfall if any
- £0.00
Use a full-year tax-paid amount, not deductions to date. Standard allowance only; excludes savings, dividends, reliefs, non-standard codes and prior-year adjustments. HMRC confirms refunds after year-end.
Try different values to compare results.
Table of Contents
Table of Contents
About Tax Refund Calculator UK
Tax Refund Calculator UK helps you work through the main numbers for this topic quickly with a simple input flow and an instant result.
Use the calculator result as a practical starting point, then review the explanation and assumptions on the page if you want more context.
Estimate an annual tax difference
Subtract standard annual Income Tax from actual Income Tax paid for the same year. On GBP 30,000 ordinary income in England, GBP 3,486 estimated liability compared with GBP 4,000 paid gives GBP 514 potential overpayment. A shortfall produces zero overpayment rather than a negative refund.
Formula explained
Calculation flow
This calculator is structured for fast UK-focused estimates with clear inputs, repeatable logic, and instant results.
Formula
Input values -> calculation engine -> instant result
How the result is built
1Enter the values requested in the form.
2The calculator applies the configured formula logic.
3The result updates instantly with a breakdown.
4Use the output to compare scenarios quickly.
Example
Example: GBP 4,000 Income Tax paid on GBP 30,000 ordinary income exceeds standard annual tax by GBP 514.
Assumptions
- Uses 2026/27 standard annual ordinary non-savings Income Tax only.
- Enter full-year Income Tax paid or projected for the same tax year; do not enter partial-year deductions, NI or student-loan deductions.
- Other income, reliefs, code adjustments and prior-year matters are excluded; no refund is guaranteed.
Source basis
- UK-focused calculator flow
- Structured input validation
- Instant result breakdowns
FAQ
Common questions
Trust and notes
Assumptions and important notes
This calculator is designed to give a fast estimate using the method shown on the page. Results are most useful when your inputs are accurate and the tool matches your situation.
Use the result as guidance rather than a final diagnosis or professional decision. If the result could affect health, legal, financial, or compliance decisions, verify it with a qualified source where appropriate.
- Uses 2026/27 standard annual ordinary non-savings Income Tax only.
- Enter full-year Income Tax paid or projected for the same tax year; do not enter partial-year deductions, NI or student-loan deductions.
- Other income, reliefs, code adjustments and prior-year matters are excluded; no refund is guaranteed.
Method
UK calculator guidance
Last reviewed
April 17, 2026