The instinct when a tenant breaks a lease and moves out early is straightforward: they signed a 12-month lease, they're on the hook for the rent through month 12. In California, that instinct is only half right. State law gives you a legitimate claim for lost rent — but it comes with a condition that surprises a lot of landlords: you have to actually try to re-rent the unit before you can collect.
The Rule: Civil Code § 1951.2
When a tenant breaks a lease and vacates before the term ends, California Civil Code § 1951.2 governs what you can recover. The starting point is straightforward — the tenant owes rent for the remainder of the lease term. But before you can collect that amount, you have a legal duty to mitigate damages: a good-faith, reasonable obligation to try to re-rent the unit rather than letting it sit vacant and simply billing the departed tenant for the full remaining term.
This isn't a minor technicality. If you don't make a genuine effort to re-rent, a court can significantly reduce what you're entitled to collect — potentially down to nothing for the period you could have reasonably re-rented the unit but didn't try.
What "Reasonable Effort" Actually Means
The duty to mitigate requires you to market the vacant unit the same way you would market any other vacancy — advertising it, listing it, and showing it to prospective tenants at a fair market rental rate. You're not required to accept a below-market offer just to fill the unit faster, and you're not required to prioritize re-renting this unit over other vacancies you may be handling at the same time, as long as your overall marketing effort is genuinely reasonable.
What you can't do is leave the unit sitting empty — unmarketed, unlisted, unshown — while the meter runs on the departed tenant's liability. Courts have been clear that this "sit and sue" approach conflicts directly with the statute's purpose.
What You Can Actually Recover
Once you've made a reasonable effort, your recoverable damages generally include:
- Rent for each month the unit remains vacant, up until a new tenant takes possession or the original lease term would have ended, whichever comes first
- The rent differential, if you're able to re-rent but only at a lower rate than the original lease
- Reasonable re-renting costs — advertising expenses, and turnover cleaning directly tied to preparing the unit for a new tenant
Once a new tenant actually takes possession, the departed tenant's liability for future rent generally ends — you can't collect from both the old and new tenant for the same period.
The Habitability Exception
Before pursuing any of this, it's worth checking whether the tenant actually had a valid legal basis for breaking the lease in the first place. If a tenant left because of a genuine habitability issue — conditions that made the unit legally uninhabitable and that you failed to address — they may owe no damages at all, regardless of mitigation. Whether a given situation qualifies is fact-specific, and it's the first question worth resolving before assuming you have a valid claim.
Documentation Is What Wins or Loses This
Because the burden of proof is on you to show you made a reasonable mitigation effort, the paper trail matters as much as the effort itself. If this ever ends up in small claims court, you'll want to show:
- When the unit was listed, and where
- The asking rent compared to the original lease rent
- Dates of showings and applicant activity
- The date a new tenant signed and took possession
A landlord who genuinely re-rented the unit quickly but never documented the marketing effort can end up in the same weak position as one who didn't try at all — because from the court's perspective, there's no way to distinguish the two without records.
Turning over a unit after an early move-out? LeaseConnectPro tracks your property's listing status, lease dates, and ledger entries in one place, so if a former tenant disputes what they owe, you have a dated record of your re-renting effort instead of reconstructing it from memory. Download the app →
Keep the Record as You Go
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This article is for general informational purposes and isn't legal advice. Damages calculations after a lease break are fact-specific — confirm your situation with a licensed attorney before pursuing a claim.