You can rent out your house and buy another, and most homeowners who do it finance both properties with mortgages rather than selling first. The path works if three things line up: your current loan allows the conversion, your income and reserves are strong enough to carry two mortgages under the lender’s math, and you handle the lease, insurance, and tax timing before you apply for the new loan. Miss any of those, and the plan either collapses at underwriting or costs you far more than it should.
Confirm Your Current Mortgage Allows the Conversion
Pull out your closing documents and read the occupancy clause before you do anything else. Most primary residence loans require you to move in within 60 days of closing and live in the home for at least 12 months. FHA and VA loans carry similar occupancy periods. Renting the property out before you’ve satisfied that window exposes you to an occupancy fraud investigation.
Misrepresenting how you use a mortgaged property is a federal offense under 18 U.S.C. § 1014, with penalties up to $1,000,000 in fines and 30 years in prison.1Office of the Law Revision Counsel. 18 USC 1014 – Loan and Credit Applications Generally The practical risk is usually a lender who discovers early conversion and accelerates the loan, demanding full repayment. If you can’t pay, foreclosure follows, and that stays on your credit for seven years. Lenders may also re-underwrite the loan at investment property terms, raising your rate retroactively.
Once your occupancy period is complete, notify your lender and your insurance carrier in writing before placing a tenant. Some lenders require a formal notice; others just need to confirm the conversion won’t trigger a due-on-sale clause. A short phone call closes this out.
Qualifying for Two Mortgages at the Same Time
Lenders look at three numbers when you’re carrying two properties: your total debt-to-income ratio with both mortgage payments included, how much rental income they’ll credit toward offsetting the old one, and whether you have enough reserves to cover both if a tenant disappears.
Debt-to-Income Limits
Most conventional lenders follow Fannie Mae. Loans run through Fannie’s automated underwriting cap total DTI at 50 percent. Manually underwritten loans drop that ceiling to 36 percent, with room up to 45 percent for borrowers with strong credit and substantial reserves.2Fannie Mae. Debt-to-Income Ratios Both mortgage payments count, along with car loans, student loans, minimum credit card payments, and any other recurring debts.
Only 75 Percent of the Rent Counts
This is the number that catches most people off guard. Under Fannie Mae and Freddie Mac guidelines, lenders credit only 75 percent of your projected gross monthly rent as qualifying income. The other 25 percent is assumed lost to vacancies, repairs, and management.3Fannie Mae. B3-3.8-01, Rental Income
Run the math on your own property. If it rents for $2,000, the lender uses $1,500. If the full PITI payment on that mortgage is $1,600, the lender still sees a $100 monthly gap, and that gap gets added to your debts. Many homeowners expect rent to fully wash out the old mortgage in the DTI calculation. It almost never does.
Cash Reserves
Fannie Mae requires at least six months of principal, interest, taxes, insurance, and association dues for the investment property, held in accessible accounts. If you own additional financed properties, the reserve requirement scales up based on the total unpaid balance across all of them.4Fannie Mae. B3-4.1-01, Minimum Reserve Requirements Savings and brokerage balances count. Retirement accounts may count at a discount; locked-up 401(k) funds generally don’t.
Funding the Down Payment on the New House
Because the new home is your primary residence, you qualify for primary residence terms: as little as 3 to 5 percent down on a conventional loan, or 3.5 percent on an FHA loan. Compare that to buying a straight investment property, where Fannie Mae requires at least 15 percent down on a single unit and 25 percent on multi-unit.5Fannie Mae. Eligibility Matrix Primary residence rates also typically run 1 to 2 percentage points below investment property rates.
The down payment itself usually comes from equity in the home you’re converting. The timing of how you tap that equity matters, because access is cheaper while the property is still your primary residence.
Cash-Out Refinance Before You Convert
A cash-out refinance replaces your current mortgage with a larger one and hands you the difference. On a primary residence, lenders allow up to 80 percent loan-to-value. After conversion, that drops to 75 percent on a single unit and 70 percent on multi-unit.5Fannie Mae. Eligibility Matrix If you want cash out, do it before converting. You get more of it at a better rate.
The trade-off: you lose your current interest rate. If you locked in a low rate years ago, refinancing it away raises the monthly payment on the rental and shrinks your cash flow. Closing costs usually run 2 to 5 percent of the new loan amount.
HELOC
A home equity line of credit sits behind your existing first mortgage without touching it, so you keep your original rate. HELOCs carry variable rates tied to prime plus a margin, roughly 7.5 to 9 percent in the current environment. You draw only what you need and pay interest only on what you’ve drawn, which keeps the cost manageable for short gaps.
Home Equity Loan
A home equity loan is a fixed-rate lump sum over 10 to 15 years, creating a second lien on the property. Payments are predictable. Either way, whether you use a HELOC or a home equity loan, the payment counts toward your DTI when you apply for the new mortgage.
Bridge Loan
Bridge loans run 3 to 12 months and typically price a couple of percentage points above prime, which puts rates around 8.5 to 9 percent with prime at 6.75 percent as of late 2025. They’re built for speed when you need capital fast and have a clear exit, but they get expensive if your timeline slips.
Documents and Insurance to Have Ready Before You Apply
A Signed Lease
A signed one-year residential lease is the baseline document the lender needs to credit rental income. It must state the monthly rent and security deposit. Get it signed before you submit the mortgage application. Without a lease, the lender has no rental income to offset the old payment and your DTI will not work.
Rent Appraisal
The lender confirms your expected rent independently. For a single-family rental, the appraiser completes Fannie Mae Form 1007, the Single-Family Comparable Rent Schedule, comparing your property to nearby rentals to establish fair market rent.6Fannie Mae. Appraisal Report Forms and Exhibits If your signed lease rent is well above the appraiser’s number, the lender uses the lower one. Price the unit at market from the start.
Landlord Insurance
A standard homeowner’s policy (HO-3) does not cover a tenant-occupied property. You need a landlord policy, commonly a DP-3, which covers the structure and your liability but not the tenant’s belongings. Switch the policy before the tenant moves in. An unreported conversion can result in denied claims or canceled coverage.
Local Rental Registration
Many cities and counties require a rental license, registration, or certificate of occupancy, and some require a safety inspection covering smoke and carbon monoxide alarms and exit routes. Fees range from under $100 to several hundred dollars. Call your local building or housing department early, because inspection backlogs can push your timeline out by weeks.
HOA Rules
If your home is in an HOA, read the CC&Rs before you list it. Associations commonly cap the number of rentals allowed at one time, require board approval of tenants, set minimum lease terms, or prohibit rentals outright. Violations can bring fines and forced tenant removal. Deed restrictions on properties outside an HOA can do the same.
Fair Housing
As a landlord you’re subject to the Fair Housing Act, which prohibits discrimination based on race, color, national origin, religion, sex, familial status, or disability.7U.S. Department of Housing and Urban Development. Housing Discrimination Under the Fair Housing Act Many states and cities add protected classes on top. Apply the same written screening criteria to every applicant, document every decision, and keep the paperwork. Discrimination complaints from rejected applicants are one of the most common legal problems new landlords face.
Tax Consequences of Converting Your Home to a Rental
Depreciation Starts Automatically
Once the property is placed in service as a rental, you depreciate the building (not the land) over 27.5 years on a straight-line basis under MACRS, using the mid-month convention.8Internal Revenue Service. Publication 527 (2025), Residential Rental Property Depreciation lowers your taxable rental income each year, but it also lowers your basis, which raises the taxable gain when you sell. The IRS recaptures depreciation on sale whether or not you actually claimed it, so skipping it saves nothing.
What You Can Deduct
Rental income and expenses go on Schedule E. Deductible items include mortgage interest, property taxes, insurance, repairs and maintenance, property management fees, travel related to the rental, and the share of tax preparation costs attributable to it.9Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040) Capital improvements like a new roof or HVAC system aren’t deducted in the year paid. They’re added to basis and depreciated.
Passive Loss Limits
Rental real estate is a passive activity, so rental losses generally can’t offset wages or other active income. If you actively participate in managing the property, you can deduct up to $25,000 in rental losses against other income. The allowance phases out between $100,000 and $150,000 of modified adjusted gross income.10Internal Revenue Service. Publication 925 (2025), Passive Activity and At-Risk Rules Above $150,000, losses suspend and carry forward to offset future rental income or reduce gain at sale.
The Capital Gains Clock
This is the long-term money decision most homeowners underestimate. When you sell a primary residence, you can exclude up to $250,000 of gain ($500,000 if married filing jointly) from income, provided you owned and used the home as your main residence for at least two of the five years before sale.11Internal Revenue Service. Topic No. 701, Sale of Your Home After you convert, the five-year window keeps running. Rent the property out for more than three years and you’ve passed it. The exclusion is gone.
Inside the window, gain tied to periods of “nonqualified use” (time the home wasn’t your principal residence) is not eligible for the exclusion. Rental time that falls after your last period of use as a primary residence doesn’t count as nonqualified use under the statute.12Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence So if you lived in the home for four years and then rented it for two, you can still take the full exclusion on the qualifying portion of gain. If the home had rental periods before you lived there, the allocation gets complicated. Track every occupancy and rental date.
Closing on the New Home
With the lease signed, landlord insurance in place, the rent appraisal complete, and reserves documented, you submit the full application on the new home. The underwriter is reviewing two properties instead of one, so expect the file to move more slowly than a standard purchase.
One advantage of keeping the old property: your offer on the new home doesn’t need a sale contingency. That’s less risk for the seller and more leverage for you on price and terms. After approval, the closing itself follows the usual path: final walkthrough, signing, keys. Coordinate your move-out with the tenant’s move-in so the rental doesn’t sit empty. Every vacant month is lost income and one month deeper into the reserves the lender required you to hold.
One last item before you accept a tenant’s money: security deposit limits and handling rules vary by state, with caps ranging from one month’s rent to no cap at all. Many states impose penalties of two to three times the deposit for violations. Check your state’s rules before you collect anything.