Council Tax Support Calculator United Kingdom
This Council Tax Support calculator estimates the reduction on your bill from band ratios and your council's scheme figures, and what is left to pay each month.

What it does
The Council Tax Support Calculator estimates how much Council Tax Reduction a household could get against its bill, and what is left to pay each month.
Data sources & parameters
The figures below drive this calculator. We keep them aligned with the latest official guidance, and each result recalculates automatically whenever a value changes.
| Parameter | Value | Source | Last updated |
|---|---|---|---|
| Council Tax band ratios (ninths of Band D) | Rate schedule | gov.uk | Effective 1993-04-01 |
| Council Tax band proportions (Scotland, s.74) | Rate schedule | legislation.gov.uk | Effective 2017-04-01 |
| Council Tax band ratios (Wales, ninths of Band D) | Rate schedule | legislation.gov.uk | Effective 2005-04-01 |
We always strive to use the latest data for every variable so our results and reports are as accurate as possible. Even so, errors are possible — you should not rely on this tool or its report alone, and we accept no liability for any decision made based on it.
The formula
Weekly support = (weekly bill × maximum support %) − (weekly income − applicable amount) × taper − non-dependant deductions, floored at zero
How it works
It converts the council's Band D charge into the charge for your band using the statutory band ratios, applies any discount, takes the scheme's maximum support, then removes the taper on income above the applicable amount and any non-dependant deductions.
Where it is used
- Estimating a Council Tax Reduction award before applying
- Seeing how extra earnings taper the award
- Checking the Council Tax left to pay after support
Worked example
On a Band D bill of … with £250.00 a week of counted income against a £180.00 applicable amount, the estimated award is … a week — … over the year, leaving … to pay, or … a month.
Council Tax Support reduces your Council Tax bill according to your household’s income, and this calculator estimates how much of the bill it could cover. Enter your council’s Band D charge, your band, the income the scheme counts and the scheme’s own applicable amount and taper. The tool returns a weekly and annual award and what is left to pay.
How the bill is worked out before any support
Every home sits in a valuation band, and each band’s charge is a fixed proportion of the Band D charge. In England, Band A is six ninths, Band B seven ninths, Band C eight ninths, Band D nine ninths, Band E eleven ninths, Band F thirteen ninths, Band G fifteen ninths and Band H eighteen ninths, ratios unchanged since 1993. Wales has a ninth band, I, at twenty-one ninths, and Scotland raised the ratios for Bands E to H in 2017. The calculator holds these statutory ratios as parameters and applies the set for the nation you choose; everything else you type in.
Discounts come next. The best known is the 25% single person discount, which also applies where everyone in the household except one person is disregarded; if everyone is disregarded, the discount is 50%. Students, apprentices, carers and people with a severe mental impairment can be disregarded. Support is calculated on the bill after discounts, so fill in the discount field in the advanced options.
Why council tax support has no national formula
When Council Tax Benefit was abolished in April 2013, its replacement in England was localised. Central funding was cut by around ten per cent and each billing authority designed its own working-age scheme, so there are roughly three hundred schemes. Some cover the whole bill for the poorest households; many cap support at 70, 80 or 91.5% so that every working-age household pays something. Tapers range from 15 to 30% of excess income, and applicable amounts, capital limits, minimum awards and non-dependant deductions all vary.
Wales and Scotland kept national schemes, which are more generous and can meet a full bill, and pension-age applicants in England remain under national regulations. A single national taper would give a confidently wrong answer to most users, so the calculator asks for your scheme’s figures.
What the calculator does with your numbers
First it converts the Band D charge into your band’s charge using the statutory ratios and applies any discount. Dividing that bill by 52 gives the weekly liability the scheme works with.
Second it sets the maximum the scheme will pay: the weekly liability times the maximum support percentage. On a 100% scheme that is the whole weekly bill; on an 80% scheme, four fifths of it.
Third it applies the means test. Income above the applicable amount is excess income, and the taper removes a percentage of the excess from the maximum award. A 20% taper on £70 of excess income removes £14 a week. Any non-dependant deduction, a fixed weekly amount for an adult living with you who is not your partner, is taken off too.
Finally the award is floored at zero, capped at the bill and set to nil if your capital exceeds the scheme’s limit. The annual figure is the weekly award times 52. The results spread what is left to pay over twelve monthly instalments, though councils bill over ten instalments by default unless you ask for twelve.
A worked example
A Band D home in an area where the Band D charge is £2,280 has a weekly liability of about £43.85. The scheme pays up to 100%, the applicable amount is £180 a week and the taper is 20%. With £250 a week of counted income, the excess is £70, the taper takes £14 and the weekly award is £29.85. Over a year that is £1,552 of support against a £2,280 bill, leaving £728 to pay, about £60.67 a month.
In Band A with a single person discount, the bill falls to £1,520 through the band ratio and then to £1,140 through the discount. If income is below the applicable amount, no taper applies and the award covers the whole remaining bill.
Income, capital and non-dependants
Not all income counts. Most schemes disregard Personal Independence Payment, Disability Living Allowance and Attendance Allowance, and many disregard a few pounds a week of earnings before the taper starts. Most treat Universal Credit as income but disregard the housing element, and some use a banded income grid instead of a taper. For the closest estimate, enter the figure your scheme counts rather than gross household income.
Capital is treated more bluntly. Above the scheme limit, commonly £16,000, there is no award. Between a lower threshold and the limit, many schemes add a tariff income for each £250 of capital, which then feeds into the taper.
A non-dependant is an adult who lives with you and is not your partner, such as a grown-up son or daughter. Schemes assume they contribute and take a fixed weekly deduction, usually stepped by their income. Some deductions do not apply, for example where you or your partner receive certain disability benefits.
Applying and what to do if the award looks wrong
Apply to the council that issues your bill, not to the DWP, and apply as soon as you think you qualify: most schemes backdate only briefly, and some not at all. Claiming Universal Credit does not automatically claim Council Tax Support, which is a common reason households miss out. If an award is refused or looks too low, ask for a written explanation, then a revision, and if it is still wrong you can appeal to the Valuation Tribunal free of charge. If you think your home is in the wrong band, challenge that with the Valuation Office Agency rather than the council.
The result is an estimate based on the scheme figures you entered and does not create an entitlement. It is not financial or legal advice. Only your council can decide an award, so use this to see roughly where you stand and then apply.
About This Tool: Council Tax Support
Council Tax support: use this tool to get an instant, accurate estimate. The figures follow official guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.
Tax year 2026
