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Lease Break vs Sublease Calculator

Tenants leaving a lease early have two real options: pay the landlord an early termination fee and walk away clean, or find a subletter who covers rent for the remaining months. Each has hidden cost — break fees often run 1-2 months plus forfeited deposit, while sublets usually rent at a discount, charge a finder cost, and expose you if the subletter flakes. This calculator sizes both so you pick the cheaper exit.

Monthly rent

Months left on lease

Early termination fee (months of rent)

Forfeited security deposit

Re-letting / admin fees

Expected sublease rent

Usually 5-20% below your current rent

Months vacant before subletter starts

Listing + broker finder fee

Subletter flake risk

Chance the subletter stops paying

Cheaper exit

Break lease

Savings vs other path

$450

Break-lease total cost

$4,600

Sublease total cost (risk-adjusted)

$5,050

Remaining rent if you stayed

$13,200

Sublease monthly gap × months

$1,250

Rent before subletter starts

$2,200

Risk-adjusted flake loss

$1,100

How the math works

Sublet costs split into gap rent (you pay while searching), the monthly shortfall between your rent and the discounted sublease rent for the covered months, and a risk haircut for the chance the subletter stops paying. The break path is simpler: a flat fee (usually 1-2 months rent), possible forfeited deposit, and any re-letting admin charge.

Quick rule: if your sublease discount is under 10% and you can fill in under 3 weeks, subleasing almost always wins. If the market is soft and the discount is 15%+, the break fee usually wins because you cap the pain at a known number. Always put the landlord's decision in writing before you commit either way.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

How this calculator works

What this page estimates

This Lease Break vs Sublease Calculator is built to give a quick, browser-based estimate for lease break vs sublease. Tenants leaving a lease early have two real options: pay the landlord an early termination fee and walk away clean, or find a subletter who covers rent for the remaining months. Each has hidden cost — break fees often run 1-2 months plus forfeited deposit, while sublets usually rent at a discount, charge a finder cost, and expose you if the subletter flakes. This calculator sizes both so you pick the cheaper exit. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.

Calculation approach

The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.

Example workflow

For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.

Practical checks

Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
Run a low, base, and high case when the inputs are estimates.
Check the related calculators below when the next decision depends on a different assumption.

How to interpret the lease break vs sublease result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this lease break vs sublease estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

How to Use

Enter your remaining rent, months left on the lease, and the early termination fee the landlord will charge to let you out.
Add any forfeited security deposit, re-letting fees, or broker charges the landlord will keep.
For the sublease side, enter the expected sublease rent (usually 5-20% below asking), the months it will sit vacant before the subletter starts, and listing / finder fees.
Compare net cost — the calculator applies a flake-risk haircut to the sublease path since you remain on the hook if your subletter stops paying.

Frequently Asked Questions

How do early termination fees usually work?

Most residential leases set the break fee at 1-2 months of rent, sometimes with forfeiture of the security deposit. Some states cap it at 'actual damages' — the landlord's real re-letting cost plus any gap rent until a new tenant signs. Always read the termination clause before negotiating; verbal promises from leasing agents do not stick.

Is subleasing even allowed?

It depends on your lease and state. Many leases require written landlord approval and give them discretion to reject. New York's Real Property Law §226-b forces landlords to accept a reasonable subletter; most other states do not. If your lease bans subleases, ignoring it is a lease violation and a fast track to eviction.

Why a flake-risk haircut on sublease?

You're still the primary tenant. If your subletter stops paying or trashes the unit, the landlord bills you and your credit takes the hit. We apply a default 10% risk haircut because roughly 1 in 10 sublets end badly — pick vetted subletters (references, credit check, deposit) to bring that number down.

Should I always negotiate the break fee?

Yes. Landlords frequently agree to 1 month instead of 2 — especially in a strong rental market where re-letting is fast. Offer to leave the unit clean, allow showings, and give 60 days notice. Get the reduced fee in writing before you vacate.