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House Hacking Calculator

See how much renting out other units (or rooms) in your property offsets your mortgage payment, and how your net housing cost compares to renting elsewhere.

Quick answer: Estimate signed housing cash flow after entered rental income, expenses, vacancy reserve, and mortgage payment. Enter Total Monthly Mortgage Payment, Rental Income From Other Units, Monthly Rental Expenses and Vacancy Reserve, and Market Rent for a Comparable Unit to personalize the estimate. It returns Signed Net Housing Cost, Monthly Savings vs Renting, and Annual Savings vs Renting so you can compare the impact before choosing a next step. Use it to compare payment, equity, rate, and timing tradeoffs before applying or changing a loan.

Signed Net Housing Cost
$1,000
Signed Net Housing Cost
$1,000
Monthly Savings vs Renting
$800
Annual Savings vs Renting
$9,600
Diagnostic

After rental income from other units, your net housing cost is about $1,000 a month.

That's $800 a month better than paying $1,800 to rent a comparable place.

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What to do next

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Your action plan
  1. 1

    Set the target and timeline for this plan

    Estimate signed housing cash flow after entered rental income, expenses, vacancy reserve, and mortgage payment.

  2. 2

    Pressure-test one alternate scenario before deciding

    Assumptions change the answer, especially when rates, taxes, or timing matter.

  3. 3

    Save the result to Money Map or use the linked next action

    Turn the result into a prioritized action instead of treating it as a one-off number.

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This is an educational estimate, not tax, legal, investment, or lending advice. Tax rules, rates, and eligibility change and depend on your full situation. Confirm with a qualified professional or the provider before acting.

Calculator action path

Turn this result into a decision

Every SwitchWize calculator connects to a product comparison, rate context, guidance, alerts, and Money Map.

Rate authority hub
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Money Map
Map this $1,000/yr opportunitySave this opportunity and see how it fits your broader money plan.
Alert
Create a rate alertWatch the market instead of checking manually.

About mortgage rates

Mortgage rates depend on loan type (30-yr fixed, 15-yr fixed, ARM, FHA, VA, jumbo), your credit score, down payment, points paid, loan amount, property state, and whether you're purchasing or refinancing. The calculator above uses a representative market rate for payment estimates — your actual rate will vary.

For a personalized rate comparison, use the tool below to see lenders ranked by APR, loan type, and your profile.

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30-yr fixed · 15-yr fixed · FHA · VA · ARM — ranked by APR
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Mortgage rates shown on SwitchWize compare pages include loan type, assumed FICO, LTV, and points. Representative only — verify all terms directly with the lender. Advertising disclosure

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Frequently Asked Questions

Everything you need to know.

What does the House Hacking Calculator show?
See how much renting out other units (or rooms) in your property offsets your mortgage payment, and how your net housing cost compares to renting elsewhere.
How should I use the result?
Use the result as a planning and comparison aid. Review the assumptions, adjust your inputs, and compare the output with your actual options before acting.
What should I do after using this calculator?
Use the related links and next-action modules on the page to compare products, continue in Money Map, or review related guidance on SwitchWize.
Is the House Hacking Calculator free to use?
Yes. SwitchWize calculators are free, and you do not need an account to run scenarios or view the result.
Does using the House Hacking Calculator affect my credit score?
No. Using a calculator does not trigger a credit check. A credit impact can occur only if you apply directly with a lender, card issuer, or provider.
Are the results personalized financial advice?
No. Calculator outputs are educational estimates based on the inputs you enter. Review assumptions and confirm terms directly with providers before making a financial decision.
What should I do after seeing the result?
Use the recommendation module on this page to compare mortgage lenders ->, or run Money Map to compare this home & mortgage decision with your other opportunities.
How does SwitchWize choose related offers?
Related offers are matched by the calculator surface (mortgage) and ranked using SwitchWize data such as rate, fees, trust signals, product fit, and switching friction. Paid relationships do not change organic ranking order.
How fresh are the rates and offers shown?
Rate and offer data is reviewed on a recurring cadence and every offer module shows review context or links to the methodology and disclosure pages.
Where can I see the ranking methodology?
The SwitchWize methodology page explains how rate freshness, editorial review, affiliate disclosure, and category ranking factors work.
Can Money Map use this result?
Yes. Money Map is the broader diagnostic path: it compares savings, mortgage, cards, and debt so you can see whether this calculator result is your highest-impact next move.

Why This Matters

House Hacking Calculator helps users make a home & mortgage decision with clearer numbers, assumptions, and next actions.

How to Use It

  1. 1Enter your numbers in the input panel.
  2. 2Review the live results and interpretation on the right.
  3. 3Use the goal outputs to compare options or plan the next step.
  4. 4Use the related links below if you want to move from analysis to action.
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