How to Check if Your Lewisham Council Tax Reduction Calculation Is Correct

If you've received a Council Tax Reduction decision notice from Lewisham Council and the award seems lower than expected, check it before accepting it. The council processes thousands of working-age CTR assessments, and calculation errors — particularly around income disregards, non-dependant deductions, and the interaction between Universal Credit and the local scheme — happen more often than most residents realise. You have the right to request a formal review of any decision, and you don't need a solicitor or advice agency to do it. But knowing what to check first separates a valid challenge from a frustrating dead end.

What the Decision Notice Should Show You

When Lewisham assesses your Council Tax Reduction, the decision notice sets out the council's calculation. At minimum, it should include:

• Your applicable amount — the amount the council says you need to live on, based on your household composition and any premiums (disability, carer, lone parent)
• Your assessed income — your gross income minus applicable disregards
• The excess income — the amount by which your assessed income exceeds your applicable amount
• The taper calculation — 20% of the excess income, which is deducted from the maximum award
• Your weekly CTR award — subject to Lewisham's 75% cap for working-age claimants
• Any non-dependant deductions — flat-rate amounts subtracted for other adults living in your home

Some decision notices from Lewisham are more detailed than others. If yours only shows the final award without breaking down the calculation, you can request a full breakdown — the council is obliged to provide one.

The Five-Point Check

1. Verify Your Income Figure

Compare the income figure on the decision notice against your actual income records. For Universal Credit claimants, use your latest UC statement as evidence, but the assessed CTR income may not match the UC payment total: Lewisham uses the Universal Credit award components, earned income, and unearned income in its means test. For employed residents, compare it with recent payslips after applying the relevant earnings disregard.

Lewisham's earnings disregards for 2026/27:

• Single person: £5 per week
• Couple: £10 per week
• Lone parent: £25 per week
• Disability premium or carer premium: £20 per week

If the council assessed your income at £180 per week but your actual earnings after the correct disregard should be £155, the excess is overstated and your award is too low. This is the single most common error in CTR calculations.

2. Check the Applicable Amount

The applicable amount is the government's calculation of what your household needs to live on. It includes personal allowances (set nationally) plus premiums for specific circumstances — disability, severe disability, carer, or enhanced disability. If you qualify for a premium that isn't reflected in the applicable amount, your excess income is overstated and your award is reduced.

Common missed premiums:

• Carer premium — if you receive Carer's Allowance or qualify for the underlying entitlement but chose not to claim it
• Disability premium — if you receive PIP, DLA, or ESA with the support component
• Enhanced disability premium — if you receive the enhanced rate of PIP daily living component or higher-rate DLA care

3. Verify Non-Dependant Deductions

If other adults live in your home (adult children, friends, relatives), Lewisham applies non-dependant deductions — flat weekly amounts subtracted from your CTR before it's paid. The deduction varies by the non-dependant's income and employment status.

Check that:

• The number of non-dependants matches who actually lives with you (not visitors or people who've moved out)
• Each non-dependant's income band is correct — the deductions increase with income
• Anyone under 25 on Income Support, income-based JSA, or income-related ESA should attract a nil deduction
• Full-time students and youth trainees are disregarded for non-dependant deduction purposes
• If you or your partner receive the PIP daily living component, Attendance Allowance, or DLA care, non-dependant deductions are waived

A non-dependant deduction applied to someone who's moved out, or at the wrong income band, directly reduces your CTR.

4. Confirm the 75% Cap Was Applied Correctly

Lewisham's working-age scheme caps CTR at 75% of your council tax liability (after any non-means-tested discounts like Single Person Discount). The remaining 25% is your mandatory minimum contribution.

Verify that the liability figure used is correct. For a Band D property in 2026/27, the total council tax is £2,237.33. With Single Person Discount (25%), the liability drops to £1,678.00. The maximum CTR award should be 75% of that reduced liability — not 75% of the full amount before the discount was applied. Getting the order of deductions wrong inflates your liability.

5. Check the Capital Assessment

Lewisham disregards capital below £6,000 entirely. Between £6,000 and £16,000, tariff income is added — the council assumes £1 per week for every £250 (or part of £250) above £6,000. Capital above £16,000 disqualifies you from working-age CTR.

If the decision notice includes tariff income but your savings are below £6,000, that's wrong. If it disqualifies you on capital grounds but your savings have dropped below £16,000 since you submitted the claim, report the change and ask for reassessment.

What to Do if the Calculation Is Wrong

Step 1: Request a Written Breakdown

If the decision notice doesn't show the full calculation, write to Lewisham's revenues department asking for a breakdown of the applicable amount, assessed income, disregards applied, non-dependant deductions, the taper calculation, and the final award. You're entitled to this.

Step 2: Request a Formal Review

If you've identified a specific error, write to the council requesting a review of the decision. State clearly what you believe is wrong and why — for example, "The earnings disregard of £25 for a lone parent was not applied to my assessed income" or "A non-dependant deduction was applied for my son who moved out in February." Include supporting evidence (payslips, bank statements, proof of the non-dependant's move).

Lewisham must consider the grievance and tell you whether it upholds or changes the decision. The council has up to two calendar months to respond.

Step 3: Escalate to the Valuation Tribunal

If the review doesn't correct the error, you can appeal to the Valuation Tribunal Service. This is a free, independent tribunal. You don't need legal representation, and many appellants attend alone. The tribunal examines whether the council applied the scheme rules correctly — it isn't about sympathy or hardship, it's about whether the arithmetic and the rules were followed.

Who This Is For

• Lewisham residents who received a CTR decision and the award seems too low
• Residents who were refused CTR and want to understand the calculation before requesting a review
• Family members or keyworkers helping someone verify a decision
• Anyone who had a change of circumstances processed and the new award looks different from what they expected

Who This Is NOT For

• Residents who haven't yet applied — apply first through the BetterOff portal before there's a decision to check
• Residents disputing their council tax band — that's a Valuation Office Agency challenge, not a CTR issue
• Residents in enforcement (summons or liability order) — call StepChange on 0800 138 1111 for free debt advice first

The How to Claim Council Tax Reduction in Lewisham guide includes a Decision Notice Audit Worksheet that walks you through each line of the calculation, plus a template review request letter. If you've already identified an error using the checks above, the worksheet helps you document it clearly enough that the council can correct it without multiple rounds of correspondence.

Frequently Asked Questions

How long do I have to challenge a Lewisham Council Tax Reduction decision?

Send the council a written grievance promptly, explaining why you think the decision is wrong. Lewisham has two calendar months to respond. If you disagree with its response, appeal to the Valuation Tribunal for England within two months of the decision. If the council has not responded within two months, you can still appeal, but must do so within four months from the date you first contacted it. The sooner you act, the sooner any underpayment is corrected and applied to your account.

Can I get my Council Tax Reduction backdated if the original calculation was wrong?

Yes. If the council accepts that the original decision was incorrect, the revised award should be backdated to the date the error took effect — not just from the date you challenged it. The corrected amount is applied as a credit to your council tax account, reducing your future instalments or generating a refund if you've overpaid.

Do I need a solicitor or advice agency to challenge a CTR decision?

No. You can request a review directly by writing to Lewisham Council's revenues department, and you can appeal to the Valuation Tribunal without legal representation. Citizens Advice Lewisham (0800 231 5453) can help if the case is complex, but many residents successfully challenge decisions on their own by identifying the specific calculation error and presenting the correct figures with evidence.

What if Lewisham refuses to change the decision after a review?

If the council reviews the decision and maintains the original calculation, you can appeal to the Valuation Tribunal Service. The tribunal is free to use and independent of the council. The Valuation Tribunal for England generally expects you to attend the hearing, but you can ask it to decide the appeal in your absence. The tribunal examines whether the council applied the scheme rules correctly.

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