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Letting Yield & Cash Flow

Rent reduction in Germany: rights, limits and cash flow

Updated: 29 August 2026 · approx. 8 min read

"Because the heating failed I am reducing the rent by 20%." For a landlord in Germany a letter like this is not an opening bid — it is the law speaking — and at the same time it is not a blank cheque. This article sets out what the statute actually says, the three points you can genuinely examine, why the reduction tables circulating online appear nowhere in the law, and what the shortfall does to your annual figures.

The reduction happens automatically — it is not applied for

The most common landlord misconception is that a rent reduction can be "objected to" or "approved". The statute provides for no such step. Under § 536 (1) BGB a tenant is "released from the obligation to pay the rent" where fitness for use is removed, and where fitness is merely diminished has to pay "only an appropriately reduced rent" — by operation of law, as soon as the defect exists, without anyone's consent and without fault on the landlord's part.

The reason sits one section earlier: under § 535 (1) BGB the landlord must hand over the property "in a condition suitable for use in conformity with the contract and to maintain it in this condition during the lease period". The rent is the consideration for that. If the condition is partly missing, the consideration shrinks with it.

You cannot contract it away for residential lettings. § 536 (4) BGB declares void any "agreement to the contrary to the disadvantage of the tenant" — a clause excluding or capping the right to reduce simply has no effect. For commercial premises that bar does not apply.

Three points you can genuinely examine

Automatic does not mean always. The statute names three objections that remove the claim in whole or in part.

Point to checkProvisionWhat it means for you
Is the impairment substantial? § 536 (1) sentence 3 BGB "An insubstantial reduction of fitness is disregarded." A dripping tap carries no reduction. Where the threshold sits the statute does not say — it is an assessment on the facts.
Was the defect notified? § 536c (1) and (2) BGB The tenant must notify a defect "without undue delay". Otherwise the rights under § 536 BGB fall away "to the extent that the landlord was unable to provide a remedy as a result of the failure to notify". Retroactive reductions for months you knew nothing about are therefore open to challenge.
Did the tenant know on signing? § 536b BGB A tenant who knows of the defect when the contract is concluded has no rights under §§ 536 and 536a BGB; one who accepts the property knowing of the defect must reserve those rights "on acceptance". A clean handover protocol is more than paperwork.

Points two and three have a limit: under § 536d BGB a landlord cannot rely on any restriction of the tenant's rights if he "fraudulently concealed the defect". The known but unmentioned damp in the cellar offers no protection.

Why no reduction table appears in the statute

Search for a German "Mietminderungstabelle" and you will find lists of apparently precise quotas. These are collections of individual court decisions — not a legal norm, and binding on nobody. The statute gives one yardstick only, "an appropriately reduced rent" (§ 536 (1) sentence 2 BGB), measured by the extent and duration of the actual impairment. Two consequences:

The tenant owes you no period for remedy

Many landlords assume the tenant must notify the defect and allow a reasonable period for repair. The first half holds, the second does not. § 536 BGB contains no time limit — no oversight, as the neighbouring provisions show:

Tenant's rightProvisionPeriod or default required?
Reduce the rent§ 536 (1) BGBNo — the provision names none
Claim damages§ 536a (1) BGBYes, inter alia where the landlord is "in default in remedying a defect"
Remedy the defect himself§ 536a (2) no. 1 BGBYes, "where the landlord is in default in remedying the defect"
Terminate without notice§ 543 (3) sentence 1 BGBYes, "only after a reasonable period set for remedy has expired without result"

The BGH applies § 536 BGB accordingly. In a Berlin case a smell defect notified in March 2013 was not fixed until December 2015; the managing agent had expressly refused to agree to any reduction, and the tenants went on paying in full without reservation for years. The senate nevertheless held the gross rent to be "reduced by 10% (= €82 per month) under § 536 (1) sentence 2 BGB", and the tenants recovered the overpayments under § 812 (1) sentence 1 BGB (BGH, order of 4 September 2018 – VIII ZR 100/18, para. 12).

The landlord's objection therefore changes nothing, and there is no window in which the full rent still runs despite the defect. Your lever is not a deadline but speed.

The three-month shield during energy retrofits

For owners renovating, this is the most important rule of the whole topic: under § 536 (1a) BGB a reduction of fitness "is disregarded for a period of three months" to the extent it results from a measure serving an energy modernisation under § 555b number 1 BGB — that is, a structural alteration "by which final energy is sustainably saved in relation to the leased property".

In practice: façade insulation, window replacement, insulating the top-floor ceiling — where the measure sustainably saves final energy, noise, dust and scaffolding carry no rent reduction for the first three months. Three limits belong with it:

  1. Number 1 only. The shield applies solely to energy modernisation under § 555b number 1 BGB. Pure improvement of amenity value under number 4 — a new balcony, a second bathroom — is not covered.
  2. Three months only. If the site drags on, the reduction revives from the fourth month. A construction schedule that keeps the disruptive phase short is hard money.
  3. Not for maintenance. Replacing a broken boiler is upkeep, not modernisation. The same distinction governs the later modernisation rent increase.

Worked example: what a defect really costs

A flat is let at a net rent of €850 plus €200 in service-charge prepayments, so €1,050 in total. In January the heating fails, the repair takes six weeks, and the tenant reduces the total rent by 20%.

ItemCalculationAmount
Total monthly rent€850 net rent + €200 prepayment€1,050
Reduction per month€1,050 × 20%€210
Durationsix weeks = 1.5 months—
Total rent shortfall€210 × 1.5€315
Repairing the heatingtradesperson's invoice€3,200
Effect on the year€315 + €3,200€3,515

The figures show the proportion that tends to get lost in an argument: the rent shortfall is the smaller item, the repair is what costs — and costs twice over if it is delayed and the reduction keeps running. Where the shortfall persists, it is worth looking at a property tax remission for lost rent.

If too much was withheld: the tenant carries the risk

Where the reduction was wholly or partly unjustified, the difference is simply unpaid rent — the obligation to pay follows unchanged from § 535 (2) BGB. The arrears lapse after three years under § 195 BGB, running from the end of the year in which the claim arose and you learned of the circumstances (§ 199 (1) BGB); arrears from 2026 therefore usually lapse at the end of 2029.

The termination question matters more. § 543 (2) sentence 1 no. 3 BGB requires default "for two consecutive dates" with the rent or "a not insubstantial part" of it; for residential lettings § 569 (3) no. 1 BGB adds that arrears are not insubstantial only once they exceed one month's rent — a moderate reduction does not reach that threshold over months. Once it does, the rules on terminating a tenant for rent arrears apply, and the tenant's mistake will not save him: the BGH expressly rejected the view, widespread in the lower courts, that a milder standard of care applies here.

"Default in payment justifying termination without notice is not negated by absence of fault on the tenant's part where, applying customary care, he could have recognised that the factual conditions of the right of reduction he invoked do not exist."
BGH, judgment of 11 July 2012 – VIII ZR 138/11, headnote

There the cause of the mould lay in the tenants' own ventilation habits; the termination was valid. In para. 20 the senate also names the clean route for a tenant: pay the disputed amount "subject to the simple reservation of recovery, merely excluding the effects of § 814 BGB", and have the matter decided in court. A tenant who simply withholds carries the risk of a negligent misjudgement.

Conversely, the landlord-friendly limit is narrower than it sounds. Where a tenant pays in full without reservation over a longer period, recovery may fail under § 814 BGB — but only if he knew he owed nothing. Proving that is your job: the recipient of the payment bears the burden of pleading and proof for the conditions of § 814 BGB, "doubts count against him", and no evidentiary relief is granted (BGH, VIII ZR 100/18, para. 9).

The real cost lever is in the table above. A landlord who instructs promptly bears only the reduction for the duration of the impairment. Fall into default and § 536a (1) and (2) BGB additionally open damages and self-remedy to the tenant — a repair you must reimburse without controlling its scope or price.

Tax: rent that was reduced was simply never received

Here the position is refreshingly simple. Under § 11 (1) sentence 1 EStG income is received in the calendar year in which it accrued. Rent the tenant validly reduced and never paid is not income — it is neither declared nor treated as a bad debt. Anlage V, the German rental income schedule, shows the rent actually received; the guide to filling out Anlage V shows where each item belongs.

If the tenant pays up later, the payment is declared in the year it accrues; the repair invoice itself is normally immediately deductible maintenance expense.

What the courts have decided

Two decisions have already fed into the sections above: the reduction base (BGH, judgment of 2 March 2011 – VIII ZR 209/10) and the risk of withholding too much (BGH, judgment of 11 July 2012 – VIII ZR 138/11). Case law answers two further questions that do not appear in the statute at all — and both come out in the landlord's favour.

BGH, judgment of 2 March 2011 – VIII ZR 209/10

The same decision that fixes the gross rent as the reduction base also concerns floor space: where the actual area falls short of the area agreed in the contract by more than 10%, that is a defect, and the rent is reduced in proportion to the shortfall — letting the flat furnished changes nothing. Practical consequence: check the area stated in the tenancy agreement against a real measurement before negotiating percentages. A generously stated floor area has a permanent effect, not a one-off one — and the 10% threshold applies only here: for rent increases and service charges the actual area governs without any tolerance, as our article on floor area discrepancy in a German lease explains.

BGH, judgment of 29 April 2020 – VIII ZR 31/18

Increased noise and dirt from a building site on a third party's neighbouring plot generally do not constitute a defect where the landlord themselves must tolerate the emissions without any right of defence or compensation under § 906 BGB, and the tenancy agreement says nothing to the contrary. The fact that the flat was quiet when the contract was signed is not, in itself, an implied agreement on condition — the landlord would have had to respond affirmatively to the tenant's expectation in some form.

Frequently asked questions

Do I have to object so the reduction does not apply?

No objection is provided for — under § 536 (1) BGB the reduction either operates by law or it does not. A written reply is still worthwhile: it records the defect, its extent and the date of notification, and supports a later claim for the difference.

May the tenant reduce retroactively for past months?

Only to a limited extent. § 536c (2) BGB removes the rights under § 536 BGB to the extent you could not provide a remedy because notification was omitted. The date of the defect notice is therefore the single most important fact in the file.

Does the three-month shield cover a boiler replacement?

It depends on the measure. § 536 (1a) BGB links to § 555b number 1 BGB, that is to a sustainable saving of final energy. Replacing a defective unit with an equivalent one is upkeep and not covered.

Does the quota apply to the net or the gross rent?

To the gross rent. Settled case law takes the basis to be the rent including any service-charge flat rate or prepayment (BGH, VIII ZR 209/10, para. 11). On €850 net rent plus €200 prepayment, 10% is therefore €105 and not €85.

Can I exclude the reduction in the tenancy agreement?

Not for residential lettings: § 536 (4) BGB declares an agreement to the tenant's disadvantage void. For commercial premises that bar does not apply.

Rent shortfall and repair costs in one place

RenoDiary brings rental income, tradespeople's invoices and maintenance together per property and shows what a defect means for cash flow and for Anlage V.

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Sources

Update of 25 August 2026: The statement on the reference amount for the reduction was wrong. An earlier version of this article said § 536 BGB speaks only of "the rent" and that the reference amount was therefore unsettled, advising readers to calculate both net and gross. That is not correct: the BGH has held that the basis of assessment is "in principle the gross rent including a service-charge flat rate or a prepayment on service charges" (judgment of 2 March 2011 – VIII ZR 209/10, para. 11, following the judgment of 20 July 2005 – VIII ZR 347/04). For landlords that is the less favourable variant, and there is nothing to argue against it. Two sections on the case law were added at the same time: that the statute requires no period for remedy (BGH, VIII ZR 100/18) and that the tenant conversely carries the full risk of an unjustified reduction (BGH, VIII ZR 138/11).

This article provides general orientation and does not replace individual tax or legal advice within the meaning of § 3 StBerG. Whether and by how much a reduction is justified is decided on the facts of the case — the example figures are illustrations of the arithmetic, not quotas.