UK Council Tax Increase Calculator: Percentage Change in Your Bill
Work out the percentage increase in your UK council tax between two years — and the annual and monthly pound difference — so you can see how much your local authority's bill has risen.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Council tax increase | Annual change |
|---|---|---|
| £1,800 to £1,890 (+5%) | 5.00% | 90 |
| £1,500 to £1,575 (+5%) | 5.00% | 75 |
| £2,200 to £2,310 (+5%) | 5.00% | 110 |
| £1,200 to £1,236 (+3%) | 3.00% | 36 |
How This Calculator Works
Enter your previous and new annual council tax amounts. The calculator finds the percentage increase and the annual difference. Divide the annual change by 10 or 12 (council tax is usually paid over 10 or 12 monthly instalments) to see the monthly impact.
The Formula
Percentage Change
Old is the starting value, New is the ending value
Worked Example
Council tax rising from £1,800 to £1,890 is a 5% increase — £90 more a year (about £7.50 a month over 12 instalments, or £9 over 10). Council tax is set by your local authority and depends on your property's valuation band (A–H in England). Annual rises are common, and in England councils with social care responsibilities have generally been allowed to raise council tax by a capped percentage each year (a core increase plus an adult social care precept) without a local referendum — so a typical increase combines several components.
Key Insight
Council tax increases in the UK follow rules worth understanding when you see your new bill. The amount depends on your property's valuation band (A–H in England, based on 1991 values; different bands and systems apply in Scotland and Wales), and the annual increase is set by your local authority within limits: in England, councils have generally faced a referendum cap on how much they can raise core council tax, plus (for authorities responsible for social care) an additional 'adult social care precept' — so a headline rise often combines a core increase and the precept, alongside precepts for police, fire, and parish/town councils that appear as separate lines on your bill. A few practical points: check whether you're eligible for reductions — a single-person discount (25% off if you live alone), exemptions or discounts for students, certain disabilities, and low-income Council Tax Support — which many eligible households miss; and verify your band is correct, as some properties are mis-banded and can be challenged with the Valuation Office Agency (a successful challenge can lower the bill and refund overpayments). The percentage here shows how steep the rise is; the annual figure (and its monthly equivalent over your instalment plan) shows the real budget impact. If the increase strains your budget, check discounts and support schemes before assuming the bill is fixed.
Frequently Asked Questions
How is the council tax increase calculated?
Subtract the old annual amount from the new one, divide by the old amount, and multiply by 100. From £1,800 to £1,890 is (£1,890 − £1,800) / £1,800 = 5%, a £90 annual increase (about £7.50/month over 12 instalments).
Why did my council tax go up?
Your local authority sets the annual increase within limits. In England, councils have generally faced a referendum cap on core council tax, plus an adult social care precept for authorities responsible for social care — so a rise often combines a core increase and the precept, alongside police, fire, and parish precepts shown separately on the bill.
What determines my council tax band?
Your property's valuation band (A–H in England, based on 1991 property values; Scotland and Wales use their own bands). The band sets your bill relative to others in your area. Some properties are mis-banded — you can challenge your band with the Valuation Office Agency, and a successful challenge can lower the bill and refund overpayments.
Can I reduce my council tax?
Possibly. Check for a single-person discount (25% off if you live alone), student exemptions, discounts for certain disabilities, and Council Tax Support for low-income households — many eligible people miss these. Verifying your valuation band is correct can also reduce the bill. Contact your local council to apply.
How do I see the monthly impact?
Council tax is usually paid over 10 or 12 monthly instalments. Divide the annual change by your number of instalments: a £90 annual increase is about £9/month over 10 instalments or £7.50/month over 12. The monthly figure shows the real effect on your budget.
Related Calculators
Methodology & Review
The increase is the change between the old and new annual council tax divided by the old amount, multiplied by 100. It compares two annual bills directly and does not break the rise into core council tax versus the adult social care precept or other precepts.
Written by Ugo Candido · Last updated May 22, 2026.