Thuringia Security Deposit Laws: Rules for Landlords in Germany

Security deposit (Mietsicherheit or Kaution) rules for residential tenancies in Germany are set uniformly by federal law — the German Civil Code (BGB) — and apply identically in Thuringia. Violations of the deposit rules can expose landlords to legal liability and loss of the right to retain any amount.

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Maximum Security Deposit

Under § 551 BGB, the maximum security deposit in a residential tenancy is three months' net cold rent (Nettokaltmiete) — that is, the base rent excluding utility pre-payments or flat-rate charges.

The cap applies regardless of whether the property is furnished or unfurnished.

Payment in Installments

Tenants have the legal right to pay the deposit in three equal monthly installments, with the first installment due at the start of the tenancy and the remaining two with the next two monthly rent payments. Landlords cannot require full upfront payment.

Mandatory Insolvency-Safe Holding

Landlords in Thuringia must hold the deposit separately from their own assets, at a bank in an account bearing the standard interest rate for savings accounts with a three-month notice period (§ 551 Abs. 3 BGB). This ensures the tenant's money is protected if the landlord becomes insolvent.

Depositing the security in the landlord's general current account violates this requirement. If a landlord cannot prove compliant holding, tenants may exercise a right of retention on current rent payments up to the deposit amount.

Any interest earned on the deposit belongs to the tenant.

Permitted Deductions

At the end of the tenancy the landlord may deduct from the deposit:

1. Unpaid rent (including any outstanding amounts through move-out)
2. Unpaid utility top-up payments — a proportionate portion may be withheld pending the final utility reconciliation
3. Damage beyond normal wear and tear — verifiable, tenant-caused damage
4. Cosmetic repair costs — only if the tenancy agreement contains a valid cosmetic repairs clause and the clause is legally enforceable

Not Deductible

• Normal wear and tear (minor scuffs, nail holes, faded paint from light)
• Pre-existing damage documented at move-in
• Damage where the landlord was negligent in maintenance

Return Timeline

German law does not set a fixed statutory return deadline for residential deposits, but courts consistently allow landlords a reasonable review period of 3–6 months after the tenancy ends to inspect and settle accounts.

An exception: if a utility reconciliation is still pending, the landlord may retain a proportionate portion of the deposit — typically three to four times the monthly utility pre-payment — until the annual statement is finalised (which can take up to 12 months after the billing period ends). The retained amount must be proportionate to the expected balance due.

Consequences of Non-Compliance

• Unjustified withholding: The tenant can sue for return plus statutory default interest accruing from the moment the review period expired.
• Failure to hold separately: The tenant gains the right to withhold an equivalent amount from rent until compliant holding is proven.

Best Practices for Landlords

1. Create a detailed move-in report: Include dated photographs signed by both parties — this is your primary evidence for any future damage deductions.
2. Open a dedicated deposit account immediately upon receipt of funds.
3. Return the deposit promptly: Do not wait until the last possible day; prompt return builds trust and reduces disputes.
4. Document utility estimates carefully: If retaining a portion for pending utility bills, notify the tenant in writing of the amount and reason.

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