property calculator

Rent-to-Own Calculator

Option fee, rent credits, the premium above market rent, and what walking away forfeits.

Option fee plus rent credits build toward the purchase price, and both are normally forfeited if you do not buy. Example: a $285,000 price with a 3% option fee ($8,550), $2,150 rent against $1,850 market, and a 25% rent credit over 24 months accumulates $21,450 of credits — a 7.53% effective down payment — but forfeits $28,650 if the purchase never happens.

Quick actions: Save inputs, view saved runs, print, share, or export results

Saved Runs

Inputs

Agreed Purchase Price$

Option Fee%

Option Termmo

Monthly Rent You Will Pay$

Market Rent for the Property$

Rent Credited to Purchase%

Expected Annual Appreciation%

Results

Total Credits Applied

$21,450

Option Fee$8,550

Monthly Rent Credit$537.50

Total Rent Credits$12,900

Effective Down Payment7.53%

Net Purchase Price$263,550

Monthly Rent Premium Over Market$300.00

Total Rent Premium$7,200

Total Rent Paid$51,600

Total Outlay Over the Term$60,150

Effective Monthly Housing Cost$2,506.25

Forfeited if You Do Not Buy$28,650

Projected Market Value at Completion$302,357

Gain From the Locked-In Price$17,357

Equity at Purchase$38,807

Tip

Run it before signing. Rent-to-own contracts are unusually variable, and the arithmetic is where the terms become visible.

Formula

Rent-to-own formulas

Option Fee = Purchase Price × Option Fee%
Monthly Rent Credit = Monthly Rent × Credit%
Total Credits = Option Fee + (Monthly Credit × Term Months)

Net Purchase Price = Purchase Price − Total Credits
Rent Premium = (Monthly Rent − Market Rent) × Term Months
Forfeited = Option Fee + Rent Credits + Rent Premium

Equity at Purchase = Projected Value − Net Purchase Price

Two of the three amounts you pay above a normal tenancy come back to you, and only on the condition that the purchase completes. The option fee and the rent credits reduce the price; the rent premium buys the option itself and buys nothing if you walk away. That conditional is the whole arrangement — a buyer who completes has saved at a rate few sustain voluntarily, and one who cannot obtain a mortgage at the end has paid a large premium for a house they do not own.

Step by step

How the calculation works

1The purchase price is normally fixed at signing, which is the arrangement's main attraction and its main risk. A rising market means you buy below value; a falling one leaves you committed to an above-market price and the option worthless.
2The option fee is non-refundable and paid up front, commonly 1% to 5% of the price. It is credited toward the purchase only on completion, which is what makes the arrangement a real commitment rather than a free right.
3Enter market rent separately from the rent you will pay. The gap is what the option actually costs, and unlike the credits it returns nothing if you do not buy. Run the [rent affordability calculator](/calculators/rent-affordability-calculator) on the full rent rather than the market figure, since that is what leaves your account each month.
4The most important question is not on this page: can you obtain a mortgage when the term ends? Rent-to-own is usually chosen because financing is unavailable today, so set a term long enough to fix the actual obstacle and check the endgame with the [home affordability calculator](/calculators/home-affordability-calculator) before signing.
5Read the credit clause and the title position carefully. Some contracts credit less than the headline percentage or forfeit credits after a late payment, and because the seller keeps title throughout, their own mortgage default or bankruptcy can extinguish your option.

Related guides

Learn more about this calculation

Guide

Rent vs Buy Guide: Compare Ownership Cost, Flexibility, and Break-Even Risk

Use a cost-first framework to compare renting and buying, including mortgage cost, taxes, insurance, maintenance, HOA, and down-payment opportunity cost.

Guide

Home Affordability: Budget, Formula, and Calculator

Estimate a home-price range from income, debt, down payment, rate, taxes, and insurance, then test costs the DTC model does not include.

Finance Tool

Home Affordability Calculator

Answer the endgame question first: will the mortgage be approvable?

Property Tool

Rent Affordability Calculator

Run it on the full above-market rent, not the market figure.

Finance Tool

Down Payment Calculator

The target the accumulated credits need to reach.

Property Tool

Rent Increase Calculator

Value the rent freeze against what a normal tenancy would have cost.

property calculator

Rent-to-Own Calculator

Option fee, rent credits, the premium above market rent, and what walking away forfeits.

Quick actions: Save inputs, view saved runs, print, share, or export results

Saved Runs

Inputs

Agreed Purchase Price$

Option Fee%

Option Termmo

Monthly Rent You Will Pay$

Market Rent for the Property$

Rent Credited to Purchase%

Expected Annual Appreciation%

Results

Total Credits Applied

$21,450

Option Fee$8,550

Monthly Rent Credit$537.50

Total Rent Credits$12,900

Effective Down Payment7.53%

Net Purchase Price$263,550

Monthly Rent Premium Over Market$300.00

Total Rent Premium$7,200

Total Rent Paid$51,600

Total Outlay Over the Term$60,150

Effective Monthly Housing Cost$2,506.25

Forfeited if You Do Not Buy$28,650

Projected Market Value at Completion$302,357

Gain From the Locked-In Price$17,357

Equity at Purchase$38,807

Tip

Run it before signing. Rent-to-own contracts are unusually variable, and the arithmetic is where the terms become visible.

Summary

Key output metrics

Effective Down Payment

7.53%

$21,450 of credits against a $285,000 price

Net Purchase Price

$263,550

Projected value at completion $302,357

Forfeited if You Do Not Buy

$28,650

Option fee, rent credits, and rent paid above market

D3 visualization

Where Your Money Goes Over the Term

Only two of these slices come back to you, and only if the purchase completes. The market-rent portion is what you would have paid anyway.

Option fee$8,550

Rent credits$12,900

Rent premium$7,200

Market-rate rent$31,500

Guide

How to understand and use this calculator

Quick Answer — How Does Rent-to-Own Math Work?

Two payments build toward the purchase: a non-refundable option fee paid at signing, and a rent credit — a share of each month's rent set aside toward the price. Both are typically forfeited if you do not buy.

Option Fee = Purchase Price × Option Fee % *(commonly 1% to 5%)*
Monthly Rent Credit = Monthly Rent × Credit % *(commonly 20% to 30%)*
Total Credits Applied = Option Fee + (Monthly Credit × Term Months)
Net Purchase Price = Purchase Price − Total Credits Applied

Worked example: a $285,000 purchase price with a 3% option fee ($8,550), rent of $2,150 against a market rent of $1,850, a 25% rent credit, over a 24-month term.

The monthly credit is $537.50, so $12,900 accumulates over two years. With the option fee that is $21,450 of credits — an effective down payment of 7.53%, taking the net purchase price to $263,550. But you also paid a $300 monthly rent premium above market, $7,200 in total, and if you walk away you forfeit $28,650: the option fee, the credits, and the premium combined.

How to Use This Calculator: A $285,000 Two-Year Option

Enter the agreed purchase price — in a lease option this is normally fixed at signing, which is the arrangement's main attraction and its main risk. If the market rises you buy below value; if it falls you are contractually committed to an above-market price, and the option is worthless.

The option fee is your entry cost and it is non-refundable. At 3% of $285,000 that is $8,550 paid up front, credited toward the price only if you complete the purchase. One to five percent is the usual range, with two to five percent most common. This is the number that makes rent-to-own a genuine commitment rather than an idle right.

Set the monthly rent and the market rent separately, because the gap is the real price of the option. At $2,150 against a market rent of $1,850, the premium is $300 a month. Over 24 months that is $7,200 you paid for the right to buy — and unlike the credits, it buys you nothing at all if you do not. The rent affordability calculator is worth running on the full $2,150, not the market figure, since that is what you actually pay each month.

The rent credit percentage decides how fast equity accumulates. At 25% of a $2,150 rent, $537.50 a month is set aside — a substantial forced saving, and the strongest argument for the structure for a buyer who struggles to save otherwise. Combined with the option fee it produces a 7.53% effective down payment after two years, which is more than many conventional buyers reach. At 3% appreciation the property would be worth $302,357, giving $38,807 of equity at purchase against the $263,550 net price.

A Second Example: A Longer Term on a Smaller House

Longer terms change the balance between the two components. Take a $160,000 price with a 5% option fee ($8,000), rent of $1,500 against $1,300 market, a 20% credit, over 36 months at 2.5% appreciation.

The monthly credit is $300, accumulating $10,800 over three years. With the option fee, credits total $18,800 — an 11.75% effective down payment, comfortably past the 10% threshold that opens up better conventional financing. Net purchase price is $141,200.

The costs scale too. Total rent paid is $54,000, of which $7,200 is premium above market, and total outlay including the option fee is $62,000. Forfeiting the option costs $26,000 — nearly the same as the shorter, larger deal, because the smaller price is offset by the longer term and higher option fee percentage.

The effective cost of housing works out at $1,722.22 a month across the term, against a market rent of $1,300. You are paying $422 a month more than renting, and $18,800 of that is coming back to you if — and only if — you buy. That conditional is the whole deal. A buyer who completes has effectively saved at a rate few could sustain voluntarily; a buyer who cannot get a mortgage in three years has paid a $26,000 premium for a house they do not own. Check the endgame first with the home affordability calculator: if the mortgage will not be approvable at the end of the term, the structure fails regardless of how good the credits look.

What to Check Before Signing

Lease-option versus lease-purchase is the first distinction. A lease *option* gives you the right to buy; a lease *purchase* obliges you to. The second is a far heavier commitment and can leave you liable for the purchase even if your circumstances change. Know which one the contract is, in its own words, not the seller's summary.

Can you actually get the mortgage? This is the question that decides whether the arrangement works, and it should be answered at the start rather than at the end. Rent-to-own is usually chosen because a mortgage is not available today — the credit needs repairing, or the down payment is not there. If the term ends and financing is still unavailable, everything paid above market rent is lost. Set a term long enough to fix the actual problem, and use the credits as the down payment calculator target rather than assuming they will be enough.

Who owns the house, and who is paying the mortgage on it? The seller retains title throughout. If they stop paying their own mortgage, face a lien, or go through a divorce or bankruptcy, your option can be extinguished by a foreclosure you had no visibility into. Ask for the title position, record the option where the jurisdiction permits it, and consider an escrow arrangement for credits rather than trusting the seller to hold them.

Who pays for repairs? Many rent-to-own contracts shift maintenance to the tenant-buyer — you carry an owner's repair costs without an owner's title or an owner's tax treatment. Combined with an above-market rent, that can make the effective monthly cost considerably higher than the headline. And rent will not usually rise during the term, which is a genuine benefit worth quantifying with the rent increase calculator against what a normal tenancy would have cost over the same period.

Limitations

This calculator models the cash mechanics of a lease option and nothing else. It assumes the option fee and all rent credits apply to the purchase price on completion, which is what a well-drafted contract provides but not what every contract provides — some credit only a portion, some forfeit credits on a single late payment, and some cap the total. Read the credit clause specifically; it is where the arithmetic and the contract most often diverge.

It does not model the mortgage you will need at the end, the closing costs of that purchase, property taxes and insurance during the option period, or maintenance obligations the lease may transfer to you. Nor does it model the tax treatment, which differs between jurisdictions and can differ between a lease option and an instalment sale for the same set of payments. The appreciation projection is a flat annual rate applied to the agreed price, which says nothing about what the property will actually be worth.

The forfeiture figure assumes a total loss of the option fee, the credits, and the rent premium, which is the normal outcome but not the only possible one — some contracts provide partial refunds or extension rights. Rent-to-own is an unusually variable and unusually litigated arrangement, and the terms matter more than in almost any other property transaction. This is a general educational tool, not legal or financial advice — have the contract reviewed by a qualified professional before signing.

Related Calculators

Answer the endgame question first: the Home Affordability Calculator shows whether the mortgage will be approvable at the end of the term, which is what decides whether the credits are savings or a sunk cost. The Down Payment Calculator sets the target the credits need to reach, and the Rent Affordability Calculator should be run on the full above-market rent rather than the market figure. To value the rent-freeze benefit against a normal tenancy, use the Rent Increase Calculator. The Rent vs Buy Guide covers the underlying comparison.

Related concepts

Option Fee

A non-refundable payment at signing that secures the right to buy later. Credited toward the price on completion, forfeited otherwise.

Rent Credit

The share of each rent payment set aside toward the purchase. A forced saving with a condition attached: it only exists if you buy.

Rent Premium

The amount by which the rent exceeds market. Unlike credits, it buys nothing at all if the purchase does not happen.

Frequently Asked Questions

How does rent-to-own work?+

You pay a non-refundable option fee at signing and an above-market rent, part of which is credited toward the purchase price. At the end of the term you can buy at a price fixed at the outset. On a $285,000 example with a 3% option fee and a 25% rent credit over 24 months, credits total $21,450 — a 7.53% effective down payment.

How much is a rent-to-own option fee?+

Commonly 1% to 5% of the purchase price, with 2% to 5% most typical. On $285,000 a 3% fee is $8,550. It is non-refundable and credited toward the price only if you complete the purchase, which is what makes the arrangement a real commitment rather than a free option.

How much rent goes toward the purchase?+

Typically 20% to 30% of each payment, though it is entirely negotiable. At 25% of a $2,150 rent that is $537.50 a month, or $12,900 over two years. Check the clause carefully — some contracts credit less than the headline, and some forfeit credits after a late payment.

What happens if I do not buy the house?+

You normally forfeit everything you paid toward the purchase. On the worked example that is $28,650: the $8,550 option fee, $12,900 of rent credits, and $7,200 of rent paid above market. This is the central risk of the structure and the reason the mortgage question has to be answered at the start.

Is rent-to-own a good deal?+

It depends almost entirely on whether you complete the purchase. A buyer who does has effectively saved at a rate few sustain voluntarily and locked in a price. A buyer who cannot get financing at the end has paid tens of thousands above market rent for a house they do not own. The structure has no middle outcome.

What is the difference between a lease option and a lease purchase?+

A lease option gives you the right to buy; a lease purchase obliges you to. The second is a much heavier commitment and can leave you liable even if circumstances change. Confirm which one the contract is from its own wording, not the seller's description.

Who pays for repairs in a rent-to-own?+

Frequently the tenant-buyer, which many contracts specify. That means carrying an owner's repair costs without an owner's title or tax treatment, on top of an above-market rent. It can make the real monthly cost considerably higher than the headline figure suggests.

What if the seller stops paying their mortgage?+

Your option can be extinguished by a foreclosure you had no visibility into, since the seller holds title throughout. Ask for the title position, record the option where the jurisdiction permits it, and push for credits to be held in escrow rather than by the seller.

Formula

Rent-to-own formulas

Option Fee = Purchase Price × Option Fee%
Monthly Rent Credit = Monthly Rent × Credit%
Total Credits = Option Fee + (Monthly Credit × Term Months)

Net Purchase Price = Purchase Price − Total Credits
Rent Premium = (Monthly Rent − Market Rent) × Term Months
Forfeited = Option Fee + Rent Credits + Rent Premium

Equity at Purchase = Projected Value − Net Purchase Price

Step by step

How the calculation works

1The purchase price is normally fixed at signing, which is the arrangement's main attraction and its main risk. A rising market means you buy below value; a falling one leaves you committed to an above-market price and the option worthless.
2The option fee is non-refundable and paid up front, commonly 1% to 5% of the price. It is credited toward the purchase only on completion, which is what makes the arrangement a real commitment rather than a free right.
3Enter market rent separately from the rent you will pay. The gap is what the option actually costs, and unlike the credits it returns nothing if you do not buy. Run the [rent affordability calculator](/calculators/rent-affordability-calculator) on the full rent rather than the market figure, since that is what leaves your account each month.
4The most important question is not on this page: can you obtain a mortgage when the term ends? Rent-to-own is usually chosen because financing is unavailable today, so set a term long enough to fix the actual obstacle and check the endgame with the [home affordability calculator](/calculators/home-affordability-calculator) before signing.
5Read the credit clause and the title position carefully. Some contracts credit less than the headline percentage or forfeit credits after a late payment, and because the seller keeps title throughout, their own mortgage default or bankruptcy can extinguish your option.

Related guides

Learn more about this calculation

Guide

Rent-to-Own Calculator

Inputs

Results

Rent-to-own formulas

How the calculation works

Learn more about this calculation

Rent vs Buy Guide: Compare Ownership Cost, Flexibility, and Break-Even Risk

Home Affordability: Budget, Formula, and Calculator

Home Affordability Calculator

Rent Affordability Calculator

Down Payment Calculator

Rent Increase Calculator

Key facts

Rent-to-Own Calculator

Inputs

Results

Key output metrics

Where Your Money Goes Over the Term

How to understand and use this calculator

Quick Answer — How Does Rent-to-Own Math Work?

How to Use This Calculator: A $285,000 Two-Year Option

A Second Example: A Longer Term on a Smaller House

What to Check Before Signing

Limitations

Related Calculators

Related concepts

Frequently Asked Questions

Rent-to-own formulas

How the calculation works

Learn more about this calculation

Rent vs Buy Guide: Compare Ownership Cost, Flexibility, and Break-Even Risk

Home Affordability: Budget, Formula, and Calculator

Home Affordability Calculator

Rent Affordability Calculator

Down Payment Calculator

Rent Increase Calculator

Key facts

Key output metrics

Where Your Money Goes Over the Term

How to understand and use this calculator

Quick Answer — How Does Rent-to-Own Math Work?

How to Use This Calculator: A $285,000 Two-Year Option

A Second Example: A Longer Term on a Smaller House

What to Check Before Signing

Limitations

Related Calculators

Related concepts

Frequently Asked Questions