House Hacking Calculator

Crunch the numbers on how much (if any!) you’ll come out of pocket when house hacking!

Ever wished you could live for free?

Of course you do. Every time you make your mortgage or rent payment, I’d wager. Which is why we’re so keen to help you ditch it.


The World’s First House Hacking Calculator

House hacking is the beautiful science of having someone else pay for your housing costs. The traditional model involves buying a multifamily, moving into one unit, and renting out the other(s). For a detailed breakdown of how one guy with no experience did it, see this duplex house hacking case study.

Or you can house hack a single-family home through roommates, Airbnb, foreign exchange students, income suites, storage space or any other way of generating income through your home.

The more income you generate through your home, the better. If you can bring in 100% of your housing costs, then guess what – you live for free!


How to Use This House Hacking Calculator

It’s pretty easy, but instructions never hurt, right?

You enter the anticipated rental income that you can bring in every month, whether you’re renting units, bedrooms, storage space, whatever. You then enter your mortgage loan terms, and it spits out your monthly mortgage payment.

Then come your expenses: vacancy rate, maintenance and repairs, property management fees, property taxes, homeowner’s insurance. Don’t underestimate expenses, it’s a rookie mistake!

Once you’ve entered the expenses, the house hacking calculator crunches four numbers for you:

  1. The percent of your monthly mortgage payment (including principal, interest, taxes, and insurance) that your rental income can cover,
  2. The percent of your total housing costs (including all expenses, such as vacancy rate and repairs) that your rental income can cover, and
  3. Your “typical” monthly housing costs, only including the mortgage payment, and
  4. Your net monthly housing costs including all


Need a House Hacking Mortgage?

Here are today’s mortgage interest rates. Compare rate quotes from a range of mortgage lenders using Loan Depot or Credible.

Remember, with a house hacking mortgage you need to live in the property for at least a year. Moving out before that, or failing to move in at all, is a violation of the terms of owner-occupied mortgage loans.

If you’re looking for an investment property loan, see our comparison chart for rental property loan terms instead.

Free Masterclass: How One Couple House Hacked Their Way to Financial Independence

FAQ About House Hacking & The Calculator

What’s the difference between “typical” monthly housing payments and net total monthly housing payments?

In a typical month, the only expense you’ll incur is the mortgage payment. But you’ll also occasionally have large, sporadic expenses like vacancies, repairs, maintenance costs, etc. So we provide both the typical month’s housing payment, subtracting the mortgage from the rental income.

To better understand how long-term averages impact rental cash flow, see this breakdown of visualizing real estate cash flow.

Where can I find a list of all the ways to house hack?

Read our full article 10 Ways to House Hack for a comprehensive list and explanation of each house hacking strategy.

What does “PITI” stand for?

PITI stands for principal, interest, taxes, and insurance – the common expenses included in a monthly mortgage payment.

Can I house hack a rental property?

Absolutely! It works the same way: you rent a larger property than you need, and rent parts of it out. The house hacking calculator above doesn’t have an option for entering rent rather than calculating the mortgage payment, as our focus is on real estate investing after all, but just tweak the purchase price so that it spits out a mortgage payment that’s close to the rent you’ll be paying.

What service did Deni use to house hack with a foreign exchange student?

Email us at support (at) and we’ll tell you 😊

Could I house hack by adding one of those $3,000 cabin kits I see on Amazon?

Yes and no. Yes, you can build an outbuilding, AKA casita, AKA guest house on your property and rent it out either long-term or on Airbnb, to house hack and generate some extra income.

But the cheaper cabin kits don’t have plumbing, electricity, or climate control. You can add them of course, just be aware that it will mean an additional cost.

Looking for Landlord Loans?

Compare landlord lenders and fix-n-flip lenders on our simple Loans chart.

Compare Loan Terms

Spark Rental Around the Web

$100-250K in Unsecured Credit Lines

Open rotating credit lines as a real estate investor! Get a quote or see how it works:

The Charming & Witty Founders of Spark Rental

Denise Supplee Spark Rental
Denise Supplee is a landlord and former property manager, with over a decade's experience in legal forms for landlords and property managers. She's also a champion mom and licensed realtor.

Brian Davis - Spark Rental
G. Brian Davis is a real estate investor and writer who, along with his wife and daughter, spends most of the year overseas. He loves hiking, exotic wine, travel, and food, not necessarily in that order. He plans to reach financial independence by age 42.

Our goal in building Spark Rental? To help other landlords & property managers automate their rentals like we've done, so they can spend more time with the people and passions they love.

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Want a plan to retire in 5 years? We won't tell you it's easy... but we will tell you how to do it.

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