Co-Buy Calculator

Find out what your group can afford now, and what you’ll each earn over time

A different approach

Our calculator isn’t like other mortgage calculators. When you’re considering co-buying, it’s nice to get an idea of what you can afford together. So we ask:

  • How much can each co-buyer chip in for the down payment?
  • What can each co-buyer pay monthly toward the mortgage?

From there, we estimate the home price you can afford. Pretty cool, huh?

What you’ll earn in the future

We’re no good with a crystal ball, so instead we use your financial contributions and an estimate of your home’s appreciation rate to calculate each person’s individual equity growth.

Before you get started

Let’s go over a few key points before you dive in

Co-buyers don’t need to contribute equally. 

Different payments will result in different ownership shares, and that’s perfectly okay.

We’ve started with some standard inputs.

Namely, a 30-year mortgage at the current average interest rate. Feel free to experiment with others.

Appreciation rate = value increase over time

This varies widely, so we’ve used a conservative estimate (5%). Try others and see what your future may hold!

How many people are co-buying?

Buyer 1 Down Payment:

Buyer 1 Monthly Mortgage Payment:

Buyer 2 Down Payment:

Buyer 2 Monthly Mortgage Payment:

Buyer 3 Down Payment:

Buyer 3 Monthly Mortgage Payment:

Buyer 4 Down Payment:

Buyer 4 Monthly Mortgage Payment:

Buyer 5 Down Payment:

Buyer 5 Monthly Mortgage Payment:

Mortgage Inputs:

Years on Mortgage Loan

Interest Rate

Equity Growth Inputs:

Appreciation Rate

Years of Equity Growth

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Bear in mind, this estimate doesn't include property taxes, insurance, or closing costs. Your mortgage lender will take all of these into account, along with credit scores and existing debt, when determining the purchase price you can afford.

If your home appreciates at a rate of % per year, it will be worth $ in years.

The equity growth for each co-buyer is shown below. Growth is based on the home's appreciation rate and each co-buyer’s contribution to the down payment and monthly mortgage.

Pretty exciting, huh? If you want to learn more about maximizing your investment, check out this Investopedia article detailing the factors that have the biggest influence on your home’s appreciation rate.

Now that you’ve seen what’s possible, let’s make it happen! Whether you want to lay out a good co-ownership agreement with our free online tool, or get connected with a knowledgeable local real estate agent, mortgage broker, or attorney, we’re here to help you every step of the way.