Higher rates raise the mortgage payment
The most direct effect: a rising rate increases the monthly mortgage payment on a financed purchase. For example, a rate increase from 4% to 7% on a $300,000 loan raises the monthly principal-and-interest payment by roughly $590. Unless rents rise by the same amount, that $590 comes straight out of cash flow and reduces cash-on-cash return.
Rates affect property prices and cap rates
Higher borrowing costs reduce what buyers can afford, typically pushing property prices down or slowing appreciation. This causes cap rates to rise in higher-rate environments, as buyers demand more income per dollar invested. Existing fixed-rate investors are insulated from rate changes on their payment, but their property values may also be affected.
Existing fixed-rate owners are protected
If you locked in a low mortgage rate before rates rose, your payment doesn't change. Your cash-on-cash return may even improve if rents rise with inflation. The risk hits hardest for investors buying or refinancing at current rates — they bear the full impact of elevated rates.
Frequently asked questions
How much does a 1% rate increase affect cash flow?
On a $250,000 mortgage, each 1% rate increase adds roughly $160–$170/month to the payment, reducing annual cash flow by approximately $1,900–$2,000.
Do higher rates always hurt rental returns?
For new financed purchases, yes. Existing fixed-rate investors are protected, and rising rents can offset part of the impact.
Sources
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.