Deciding what's genuinely deductible from a deposit is only half the challenge, proving it to the standard a deposit scheme adjudicator actually requires is the other, considerably harder half. This guide covers the five lawful deduction categories, a concept called betterment that catches out a huge number of otherwise reasonable claims, and why the evidence file needs to start on the first day of the tenancy, not the day the dispute begins.
Figures below reflect TDS, DPS, and myDeposits 2026 adjudication guidance, current to mid-2026. This is general information, not legal advice; the specific scheme holding your deposit will have its own detailed evidence requirements.
1. The five lawful deduction categories
| Category | What it covers |
|---|---|
| Unpaid rent | Rent genuinely owed and outstanding at the end of the tenancy |
| Damage beyond fair wear and tear | Damage exceeding the reasonable, expected deterioration from ordinary use |
| Cleaning | Bringing the property back to its documented check-in standard, not a higher standard |
| Missing items | Anything listed on the inventory that isn't there, or has been replaced without agreement |
| Unpaid bills | Utility bills the tenant was contractually responsible for and left unpaid |
Every deduction across all five categories needs to be both evidenced and reasonable, an unsupported claim, however genuinely felt, simply doesn't survive the adjudication process described below.
2. Why most full claims don't succeed
According to 2026 scheme data, landlords receive the full deposit amount they claimed in fewer than 20% of adjudicated disputes. This is genuinely worth sitting with: the adjudication system isn't unusually biased toward tenants, it's that most deduction claims simply aren't backed by the itemised, dated, documentary evidence the process actually requires. A landlord who's confident a deduction is fair, but hasn't built the paper trail to prove it, is in a genuinely weaker position than the underlying facts might suggest.
3. The betterment principle
One of the most commonly misunderstood concepts in deposit deductions is betterment. If a damaged item, a carpet, a sofa, an appliance, was already several years old and showing reasonable wear before the damage occurred, a landlord generally can't claim the full cost of a brand new replacement, since that would leave the landlord in a better financial position than they were in before the damage happened. Instead, the deduction should reflect the item's realistic depreciated value at the time of the damage, not its original or current new price. This single principle is behind a genuinely large share of reduced or rejected deduction claims, and it's worth factoring into any claim before submitting it, not discovering it partway through a dispute.
4. The evidence standard adjudicators actually apply
Adjudicators decide entirely on documentary evidence, not on what either party says happened in conversation. A signed, dated check-in inventory, ideally with photographs and produced independently rather than solely by the landlord, is the single most important document in almost any deposit dispute. Critically, this evidential record needs to be built from the first day of the tenancy onward, not assembled retrospectively once a tenant has objected to a proposed deduction. Photos taken at check-out, compared directly against the equivalent check-in photos, room by room, form the backbone of a genuinely strong claim.
5. The dispute process
Where a tenant disputes a proposed deduction, either party can raise the dispute with the scheme holding the deposit (DPS, myDeposits, or TDS), which then ring-fences the disputed amount. Both parties typically submit their evidence within around 14 calendar days, and a trained adjudicator reviews the case on the balance of probabilities, with a decision generally issued within 30 working days. The decision is binding, with no internal appeal available. Adjudication itself is free; for larger disputes where the deposit alone wouldn't cover the full loss, pursuing the shortfall through the small claims track in the county court, for amounts up to £10,000, remains a separate option.
6. The undisputed portion still needs returning
Disputing part of a deposit doesn't justify withholding the whole amount. Where only a specific portion is genuinely contested, the undisputed remainder should still be returned within 10 days, with only the disputed amount held back and submitted to the scheme. Our End of Tenancy Checklist guide covers this deadline and the wider end-of-tenancy sequence in full.
7. Frequently asked questions
What can a landlord lawfully deduct from a tenancy deposit?
Lawful deductions generally fall into five categories: unpaid rent, property damage beyond fair wear and tear, cleaning required to bring the property back to its check-in standard, items missing from the inventory, and unpaid utility bills the tenant was responsible for. Every deduction needs to be evidenced and reasonable.
Can a landlord claim the full replacement cost of a damaged item from the deposit?
Not usually. Deposit scheme adjudicators apply a principle known as betterment, meaning a landlord generally can't claim the full cost of a brand new replacement if the damaged item was already old or worn, since that would leave the landlord in a better position than before the damage occurred. The deduction should reflect the item's depreciated value, not its full new price.
How likely is a landlord to win a full deposit deduction claim?
Genuinely less likely than most landlords expect. Landlords receive the full amount they originally claimed in fewer than 20% of adjudicated disputes, according to 2026 scheme data. This isn't generally because adjudicators are biased toward tenants, it's because most claims aren't backed by the itemised, dated evidence the adjudication process actually requires.
Do I have to return the whole deposit if I only dispute part of it?
No. Where only part of the deposit is genuinely disputed, the undisputed portion should still be returned within 10 days, with only the specifically disputed amount held back and submitted to the scheme for adjudication.
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