How Your Rental Property Impacts Next Mortgage Qualification

Debt-to-Income (DTI) Ratio and the 75% Rent Rule

Your DTI ratio is crucial when applying for a mortgage. For rental property owners, lenders typically count only 75% of the property's gross rental income as usable qualifying income -- the other 25% is treated as a vacancy and expense buffer. That 75% figure is then compared against the rental property's own monthly payment (PITI) to see whether it adds to or subtracts from your qualifying income.

• Surplus example: Gross rent of $2,000/month x 75% = $1,500 usable income. If the rental property's PITI is $1,200/month, the extra $300/month is added to your qualifying income, helping your DTI.
• Deficit example: Gross rent of $1,200/month x 75% = $900 usable income. If the rental property's PITI is $1,400/month, the $500/month shortfall is added to your monthly debts, hurting your DTI even though the rental technically generates income.

Reserve Requirements for Rental Property Owners

Lenders require reserves to ensure you have funds available in case of financial emergencies. Reserve requirements vary by lender and program:

Lender	Reserve Treatment	Departing Residence Rules	Rental Income Limits	Required Documents
Conventional	2-12 months of mortgage payments and reserves equal to 6-12 months depending on the loan-to-value ratio	Lender may require up to 3 months of rent for departing residence	No specific limits, but lenders consider rental income stability	Schedule E, signed lease, proof of rent deposit, market rent appraisal forms, reserve assets
FHA	2-6 months of mortgage payments and reserves equal to 3-6 months depending on the loan-to-value ratio	Lender may require up to 3 months of rent for departing residence	No more than 75% of your income can come from rental property and no more than 10 properties owned	Schedule E, signed lease, proof of rent deposit, market rent appraisal forms, reserve assets
VA	No specific reserve requirements but lenders may require up to 6 months of mortgage payments	Lender may require up to 3 months of rent for departing residence if you're not moving into the rental property	No specific limits, but lenders consider rental income stability	Schedule E, signed lease, proof of rent deposit, market rent appraisal forms, reserve assets

FAQs About Rental Property Mortgages

Can rent offset my old mortgage when qualifying for a new one?

In many cases, rental income can help offset housing expenses, such as mortgage payments and property taxes, to improve your debt-to-income (DTI) ratio. However, the specific rules vary among lenders, and some may not consider rental income until you have a history of being a landlord for a certain period.

How many reserves are needed when qualifying for a new mortgage?

Lenders typically require that borrowers maintain sufficient cash reserves to cover a few months' worth of mortgage payments, in addition to other expenses like property taxes and insurance. The exact reserve requirement varies among lenders, but it often ranges from 2-6 months of mortgage payments. FHA and VA loans may have more lenient requirements compared to Conventional loans.

Can Airbnb income count towards qualifying for a new mortgage?

Airbnb income can be considered by lenders when determining your ability to repay a mortgage, but the specific rules vary among lenders. Some lenders might require proof of consistent and stable rental income over several months or even a year, while others may not consider Airbnb income due to its irregular nature.

What if I just became a landlord and have no rental history?

If you recently became a landlord and do not have any rental history, some lenders might be more cautious about using your rental income in the qualification process. In such cases, it's essential to provide detailed documentation and a solid business plan for managing your rental property to demonstrate your ability to generate stable rental income.

What is the 75 percent rent rule, and how does it affect my DTI?

Answer: Lenders typically count only 75% of a rental property's gross monthly rent as usable qualifying income, holding back 25% as a vacancy and expense buffer. That 75% figure is compared against the rental property's own monthly payment (PITI) -- if it's higher, the surplus helps your DTI; if it's lower, the shortfall is added to your monthly debts.

Example 1: Surplus situation under the 75 percent rent rule

Answer: With $2,000 in monthly gross rent, 75% counts as usable income: $1,500. If the rental's own PITI payment is $1,200, the $300 surplus is added to your qualifying income, improving your DTI.

Example 2: Deficit situation under the 75 percent rent rule

Answer: With $1,200 in monthly gross rent, 75% counts as usable income: $900. If the rental's own PITI payment is $1,400, the $500 shortfall is added to your monthly debts, working against your DTI even though the property brings in rent.

Lender overlay considerations for qualifying with rental income

Answer: Lenders may apply overlays -- additional guidelines beyond the standard underwriting requirements -- to ensure that borrowers can manage their debts effectively. These overlays can impact your ability to qualify for a mortgage, even if you meet the 75 percent rent rule and standard DTI limits, so it's worth asking your loan officer about any lender-specific overlays before counting on rental income.