Mietvertrag Checklist: What to Look for Before Signing a German Rental Contract

Why You Need a Checklist

Finding an apartment in Germany is stressful enough. When you finally get an offer, the pressure to sign quickly is intense — especially in competitive markets like Berlin, Munich, or Frankfurt. But signing a bad Mietvertrag can cost you thousands of euros and years of headaches.

This checklist covers the 10 most important things to verify before you sign.

The 10-Point Mietvertrag Checklist

1. Kaltmiete vs Warmmiete — Know What You're Paying

• Kaltmiete (cold rent) = base rent without utilities
• Warmmiete (warm rent) = Kaltmiete + Nebenkosten (utilities)
• Verify exactly what's included in Nebenkosten: heating, water, garbage, building insurance, elevator maintenance
• Ask for the previous year's actual Nebenkostenabrechnung to see real costs

Red flag: If the landlord only quotes Warmmiete without breaking down the components, ask for a detailed split.

2. Kaution (Deposit) — Maximum 3 Months Kaltmiete

German law caps the security deposit at 3 months of Kaltmiete (not Warmmiete). You can pay in 3 monthly installments. The landlord must hold it in a separate interest-bearing account.

Red flag: Any deposit above 3x Kaltmiete is illegal. Any request for the full deposit upfront before you've moved in (while the first installment is legally due at move-in) is a warning sign.

3. Kuendigungsfrist (Notice Period)

Standard tenant notice period is 3 months. The landlord's notice period increases with tenancy length:
- Years 0-5: 3 months
- Years 5-8: 6 months
- Years 8+: 9 months

Red flag: A contract that gives the landlord a shorter notice period than legally required is unenforceable on that point, but it signals a landlord who may not respect other rules either.

4. Befristet vs Unbefristet (Fixed-Term vs Open-Ended)

• Unbefristet (open-ended) = standard, you can stay as long as you want
• Befristet (fixed-term) = ends on a specific date; landlord must have a legal reason (e.g., own use, renovation)

Red flag: A fixed-term contract without a legally valid reason. Under German law, the landlord must state the specific reason in the contract.

5. Renovierungspflicht (Renovation Obligation)

Many contracts include a clause requiring you to repaint or renovate when moving out. However, many of these clauses have been ruled unenforceable by German courts.

Rules of thumb:
- Rigid renovation schedules (e.g., "paint every 3 years") are generally invalid
- Clauses requiring you to restore original colors are usually valid
- You can't be required to hire professionals — you can do it yourself

6. Haustiere (Pets)

• Small pets (fish, hamsters, birds) cannot be banned regardless of what the contract says
• Cats and dogs typically require landlord approval, which cannot be unreasonably withheld
• A blanket "no pets" clause for cats/dogs is generally unenforceable

7. Untervermietung (Subletting)

• Most contracts require landlord approval for subletting
• If you have a legitimate reason (e.g., extended travel, financial hardship), the landlord must approve
• Short-term Airbnb subletting can usually be banned in the contract

8. Mietpreisbremse (Rent Cap)

In areas with rent caps (most major cities), the initial rent cannot exceed 10% above the local Mietspiegel (rent index). Check your city's Mietspiegel to verify.

Tip: If the rent is above the cap, you can challenge it after signing — but you must do so in writing within the first 30 months.

9. Uebergabeprotokoll (Handover Protocol)

Before moving in, document the apartment's condition with the landlord:
- Note all existing damage (scratches, marks, broken fixtures)
- Take dated photos of every room
- Both parties should sign the protocol

Red flag: A landlord who refuses to do a proper handover protocol. This protects both sides.

10. Schoenheitsreparaturen (Cosmetic Repairs)

Similar to the renovation clause but specifically about "beauty repairs" like filling nail holes, fixing minor wall damage, etc. Courts have made many of these clauses unenforceable.

Rule: If the apartment was not freshly renovated when you moved in, you generally cannot be required to renovate it when you leave.

Before You Sign

Upload your Mietvertrag to Clario before signing. You'll get:
- A plain-English summary of all key terms
- All deadlines and notice periods extracted
- Red flags highlighted automatically
- Comparison against standard German rental law

*Have a Mietvertrag to review? Upload it to Clario for a free AI-powered analysis before you sign.*