Renting vs Buying With an Assumable Mortgage
At today's 7% rates, renting is often cheaper than buying. But an assumable mortgage at 2.5% completely changes the math. Let me show you.
The Standard Rent vs. Buy Math (at 7%)
Take a $400,000 home at 7%:
- Monthly mortgage (P&I): $2,661
- Property taxes: ~$350/month
- Insurance: ~$150/month
- Maintenance: ~$300/month
- Total monthly cost: ~$3,461
Average rent for a similar home in Colorado: $2,200-$2,600
At 7%, buying costs $800-$1,200 more per month than renting. Throw in the $20,000+ down payment and closing costs, and it takes years to break even. This is why a lot of financially savvy people have been choosing to rent.
The Assumable Mortgage Math (at 2.75%)
Same $400,000 home, assumed at 2.75%:
- Monthly mortgage (P&I): $1,632
- Property taxes: ~$350/month
- Insurance: ~$150/month
- Maintenance: ~$300/month
- Total monthly cost: ~$2,432
Now buying is cheaper than renting by $200-$400/month. And you're building equity. And you're locking in a fixed payment while rents increase every year.
The assumable mortgage flips the rent vs. buy equation on its head.
The Equity Advantage
When you rent, your payment builds your landlord's wealth. When you buy with an assumable mortgage at 2.75%, a significant portion of your payment goes to principal from day one.
At 2.75%, about $700 of your $1,632 monthly payment goes to principal in the first year. That number grows every year as the amortization curve progresses. After 10 years, you've built roughly $100,000 in equity just from principal payments, not counting appreciation.
Renters have zero equity after 10 years.
The Rent Escalation Factor
Rents go up. Your assumed mortgage payment stays fixed.
If your rent is $2,400 today and increases 3% annually (the national average), in 10 years you'll be paying $3,225/month. In 20 years: $4,335/month.
Your assumed mortgage payment? Still $1,632. Every year, the gap between what you'd pay in rent and what you're paying on your assumable mortgage grows wider.
The Total Wealth Comparison
Over 10 years, here's the rough comparison:
Renter:
- Total rent paid: ~$318,000 (with 3% annual increases)
- Equity built: $0
- Net cost: $318,000
Assumable Mortgage Buyer:
- Total housing payments: ~$292,000 (fixed)
- Equity built: ~$100,000 (from payments alone)
- Home appreciation (3%/year): ~$137,000
- Net position: roughly $237,000 in equity
- Effective cost: $55,000 (payments minus equity gains)
The renter spent $318,000 with nothing to show for it. The assumable mortgage buyer spent $292,000 and has $237,000 in equity. The gap is over $500,000 in total financial difference.
Who Should Still Rent?
Renting still makes sense if:
- You're staying less than 3 years (the transaction costs of buying and selling eat into gains)
- You can't qualify for the assumption
- You can't cover the equity gap
- You need mobility for career or personal reasons
- The specific market you're in has very low rents relative to home prices
But for anyone planning to stay 3+ years who can qualify and cover the equity gap, an assumable mortgage is the clear financial winner.
Getting Started
Browse available properties in your price range. Run the calculator to compare your current rent against an assumable mortgage payment. The numbers speak clearly.
Ready to Find an Assumable Mortgage in Colorado?
Browse available listings or schedule a free call with Ryan Thomson, Colorado's leading assumable mortgage specialist.
Browse Homes | Schedule a Call | (719) 624-3472
Frequently Asked Questions
What is an assumable mortgage?
An assumable mortgage is an existing home loan that a buyer takes over from the seller at the original interest rate, balance, and terms. FHA, VA, and USDA loans are assumable. Conventional loans generally are not.
How much can I save with an assumable mortgage?
On a $400,000 loan at 3% vs. 7%, you save $1,081 per month. That's $12,972 per year, and over $300,000 over the life of the loan. Real savings, not theoretical ones.
Which loans are assumable?
FHA loans, VA loans, and USDA loans are all assumable. Conventional loans (Fannie Mae, Freddie Mac) generally have due-on-sale clauses that prevent assumption. The most valuable assumable inventory comes from 2019-2022 originations.
How do I find homes with assumable mortgages?
Most MLS listings don't flag assumable loans. You need to work with a specialist or use a service that tracks FHA and VA loan inventory. Browse assumable homes in Colorado to see what's available now.
How long does the assumption process take?
Most assumptions close in 45-90 days. The main variable is the loan servicer's processing speed. Having all your documents ready upfront and working with an experienced assumption specialist helps.
What is the equity gap?
The equity gap is the difference between the home's sale price and the existing loan balance. You cover this with cash, a second mortgage, or both. Even with a second mortgage, the blended rate often beats a new conventional loan.