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Lease renewal calculator

Compare a proposed renewal with re-listing the unit using the rent, vacancy days, and turnover cost you enter. The result is first-year arithmetic, not a recommendation.
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The short answer
How it works
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Make the result useful
Questions landlords ask
3
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Lease renewal calculator
Rent & lease
Last updated: July 2026
1. Enter the current rent for context, the renewal offer, and the rent you expect from a new tenant.
How it works
2. Enter the number of days you expect the unit to be vacant and the turnover costs you expect if you re-list.
How it works
3. The tool subtracts the daily lost rent and turnover costs from the re-listing scenario.
How it works
4. Compare the two first-year totals alongside factors the calculator cannot price, such as a tenant’s payment history.
How it works
5. Does this tell me whether to renew?
Questions landlords ask
6. How does it value vacancy?
Questions landlords ask
7. What should turnover costs include?
Questions landlords ask
Lease renewal calculator
Category
Rent & lease
Last updated
July 2026
The assumptions that move this result
Renewal rent
Proposed rent for the current tenant.
Market rent
Expected new-tenant monthly rent.
Vacancy days
Modeled days without rent.
Turn cost
Cleaning, repair, and re-listing costs.
The short answer
1. Enter the current rent for context, the renewal offer, and the rent you expect from a new tenant.
A lease renewal comparison weighs the rent from keeping a tenant against market rent after a vacancy and turnover. First-year re-list revenue equals new monthly rent × 12, minus lost rent during vacancy and the turnover costs you enter. This tool compares that against 12 months at the proposed renewal rent using your assumptions.
The short answer
Last updated: July 2026
A lease renewal comparison weighs the rent from keeping a tenant against market rent after a vacancy and turnover. First-year re-list revenue equals new monthly rent × 12, minus lost rent during vacancy and the turnover costs you enter. This tool compares that against 12 months at the proposed renewal rent using your assumptions.
After the estimate:
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Lease renewal calculator
Compare a renewal offer with re-listing.
Model the first-year rent from keeping a tenant versus turning the unit, using the rent, vacancy days, and turnover cost you enter.
Current monthly rent
$
Proposed renewal monthly rent
$
Expected new-tenant monthly rent
$
Expected vacant days if re-listed
days
Turnover costs if re-listed
$
Input-driven result
Your inputs
Formula
Result below
First-year advantage
+$1,746
Renewal produces more first-year rent after the re-listing costs entered.
Keep current tenant
$22,200
$1,850 × 12 months.
Re-list the unit
$20,454
$1,950 × 12 − 21 vacant days − $1,600 turnover.
Estimate based on your inputs. Not a promise of results.
This is first-year revenue arithmetic, not a recommendation or tenant-screening decision. It excludes payment risk, maintenance, concessions, leasing fees, and the value of a reliable tenant.
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How it works

How this tool works.

A higher market rent can look compelling until a vacant month, paint, cleaning, leasing, and the uncertainty of a new tenant enter the equation. The useful comparison is not the sticker rent; it is the first-year revenue after the costs of changing tenants.
This tool makes that comparison explicit. It models a renewal as twelve months at the offer, and a re-list as twelve months at your expected new rent less the vacancy days and turnover costs you enter.
1
Enter the current rent for context, the renewal offer, and the rent you expect from a new tenant.
2
Enter the number of days you expect the unit to be vacant and the turnover costs you expect if you re-list.
3
The tool subtracts the daily lost rent and turnover costs from the re-listing scenario.
4
Compare the two first-year totals alongside factors the calculator cannot price, such as a tenant’s payment history.
Make the result useful

Lease-renewal decision support

Current rent provides context for the renewal offer.
Renewal rent is the modeled recurring rent if the current tenant stays.
Market rent is the supportable expected rent after re-listing.
Vacancy days and turnover cost capture the modeled first-year friction of a new lease.

The assumptions that move this result

Renewal rent
Proposed rent for the current tenant.
Market rent
Expected new-tenant monthly rent.
Vacancy days
Modeled days without rent.
Turn cost
Cleaning, repair, and re-listing costs.

Calculation lens

renewal annual rent versus market rent × 12 − vacancy lost rent − turnover cost
Use the output as a documented scenario result, not a guarantee.

Read the number in context

Worked scenario
Scenario: a $100 monthly increase may be less than a turn plus two vacant weeks.
Edge case
Edge case: a high market-rent assumption without demand evidence overstates re-list value.
Does not assess tenant quality, legal requirements, or fair-housing obligations.
Worked formula
renewal annual rent versus market rent × 12 − vacancy lost rent − turnover cost
Questions landlords ask

Questions about this tool and its limits.

Does this tell me whether to renew?

No. It compares the first-year revenue in two scenarios you define. A reliable tenant, local demand, repairs, concessions, and fair-housing obligations are important considerations the arithmetic does not decide.

How does it value vacancy?

It turns the expected new monthly rent into a daily amount using monthly rent × 12 ÷ 365, then multiplies by the vacant days you enter.

What should turnover costs include?

Use your own expected cleaning, repairs, marketing, leasing, utility, and other turn costs. Do not include costs you would incur either way unless you want them in both comparisons.

Before you act

Check lease and notice rules.
Verify market evidence.
Compare payment history and turn scope.
Editorial ownership
Written and maintained by the Aptoria editorial team
Editorial method reviewed July 28, 2026. Aptoria reviews scope, source fit, examples, limitations, links, and publication gates. This record does not claim attorney, CPA, lender, appraiser, or other independent professional sign-off.
How Aptoria researches and reviewsReport a correction
Built by a landlord who's done every one of these jobs by hand.
Aptoria was built by an owner-operator managing a Brooklyn portfolio — the 11pm calls, the awkward rent texts, the April receipt-pile — not by a software team guessing at the problem.
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