Security Deposit Deduction Estimator

How to challenge deposit deductions with a clearer paper trail

Deposit disputes usually turn on evidence, not outrage. A landlord may be able to deduct for unpaid rent, missing keys, rubbish removal, cleaning beyond the move-in standard, or damage caused by the tenant. They should not usually deduct for ordinary wear and tear, vague administration charges, betterment, or replacing an old item with a brand-new one at the tenant's full expense. This estimator is designed to help tenants organize those issues before sending a dispute letter.

Start with the total claim and then work room by room. For each room, record the item being charged, the severity, the landlord's claimed amount, notes, and any supporting photos. The tool compresses evidence images in the browser and can include them in the PDF appendix, so the final letter is not just a complaint; it has a simple evidence bundle attached. That matters because deposit schemes, small claims courts, and landlords all tend to look for dated photos, inventory reports, receipts, invoices, and clear explanations.

For UK tenants, the most important concepts are deposit protection, fair wear and tear, and betterment. In England and Wales, landlords generally must protect eligible tenancy deposits in a government-approved scheme and provide prescribed information. If the deduction is disputed, the relevant scheme's alternative dispute resolution process may review the check-in inventory, check-out report, tenancy agreement, photographs, invoices, and communications between the parties. A strong response explains why a deduction is unsupported, excessive, or an attempt to charge new-for-old replacement.

For US tenants, security deposit rules vary by state and sometimes by city. Return deadlines, itemization requirements, penalty rules, forwarding-address requirements, and small-claims procedures are not uniform. The deadline shown in this tool is a source-based reference, not a definitive legal answer. Use it as a prompt to check the current statute and local rules before relying on it. The dispute letter therefore uses careful language: it asks for itemization, receipts, move-in and move-out evidence, and the lease provisions supporting each deduction.

The score on the summary page is a practical estimate of how much of the claim may be worth challenging. It is not legal advice and it does not decide who is right. The calculation treats wear and tear as highly disputable, severe tenant-caused damage as more likely to be legitimate, and additional charges according to their evidence. Cleaning, garden, rubbish, keys, and other itemized charges become stronger or weaker depending on whether there are receipts, before-and-after photos, agreement clauses, or signs of vague penalties.

This tool works best alongside the other Casamates household tools. Use the Roommate Agreement Generator before moving in to agree how shared damage, cleaning, rent, and utilities will be handled. Use the Rent Split Calculator to document fair rent contributions when rooms, income, or amenities differ. Together, those records make move-out conversations less dependent on memory and more grounded in a shared written trail.