Comparison Guide

15-Year Mortgage vs 30-Year Mortgage

15-year vs 30-year mortgage compared. Pay less interest or have lower payments? Run the numbers and see why the math isn't as simple as you think.

Side-by-Side Comparison

15-Year Mortgage

Pros

+Lower interest rate — typically 0.5-0.75% less than 30-year
+Pay dramatically less total interest over the life of the loan
+Build equity faster — own your home outright in 15 years
+Forced savings discipline — higher payments mean faster wealth building
+Free and clear before kids go to college (if you buy young enough)

Cons

-Higher monthly payments — roughly 40-50% more than 30-year
-Less cash flow flexibility — less money for investing or emergencies
-Harder to qualify — higher debt-to-income ratio
-Opportunity cost — that extra payment could earn more in the market

Best For

High earners who can comfortably afford the higher payment, people near retirement wanting to eliminate debt, and disciplined savers.

30-Year Mortgage

Pros

+Lower monthly payments — more cash flow flexibility
+Can invest the payment difference (potentially earning more than mortgage rate)
+Easier to qualify — lower debt-to-income ratio
+Inflation erodes the real value of fixed payments over time
+Can always pay extra to pay off faster (reverse is not true)

Cons

-Pay roughly 2x more total interest over the life of the loan
-Higher interest rate than 15-year
-Takes 30 years to own your home outright
-Temptation to spend the payment difference instead of investing it

Best For

Most homebuyers, especially those who will invest the payment difference, anyone who wants flexibility, and first-time buyers.

Feature	15-Year Mortgage	30-Year Mortgage
Top Advantage	Lower interest rate — typically 0.5-0.75% less than 30-year	Lower monthly payments — more cash flow flexibility
Biggest Drawback	Higher monthly payments — roughly 40-50% more than 30-year	Pay roughly 2x more total interest over the life of the loan
Best For	High earners who can comfortably afford the higher payment, people near retirement wanting to eliminate debt, and disciplined savers.	Most homebuyers, especially those who will invest the payment difference, anyone who wants flexibility, and first-time buyers.

Glen's Verdict

Former hedge fund manager, current index fund enthusiast

Get the 30-year and invest the difference. This is controversial, but the math works: if your mortgage rate is 6.5% and the market returns 10%, the 30-year + investing beats the 15-year. The catch? You actually have to invest the difference, not spend it on a nicer car. Most people won't have that discipline, which is why the 15-year's forced savings works so well in practice. If you know yourself and you'd blow the difference? Get the 15-year. If you're disciplined? 30-year is mathematically superior. Know thyself.

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Frequently Asked Questions

Which is better, 15-Year Mortgage or 30-Year Mortgage?

It depends on your situation. 15-Year Mortgage is best for: High earners who can comfortably afford the higher payment, people near retirement wanting to eliminate debt, and disciplined savers. 30-Year Mortgage is best for: Most homebuyers, especially those who will invest the payment difference, anyone who wants flexibility, and first-time buyers.

What are the main differences between 15-Year Mortgage and 30-Year Mortgage?

The key differences come down to their strengths. 15-Year Mortgage advantages include lower interest rate — typically 0.5-0.75% less than 30-year and pay dramatically less total interest over the life of the loan. 30-Year Mortgage advantages include lower monthly payments — more cash flow flexibility and can invest the payment difference (potentially earning more than mortgage rate).

Can I have both 15-Year Mortgage and 30-Year Mortgage?

In many cases, yes. Having both can provide diversification and flexibility. Evaluate your specific needs, goals, and eligibility requirements to determine if using both makes sense for your situation.

What are the downsides of 15-Year Mortgage?

Higher monthly payments — roughly 40-50% more than 30-year Less cash flow flexibility — less money for investing or emergencies Harder to qualify — higher debt-to-income ratio Opportunity cost — that extra payment could earn more in the market

What are the downsides of 30-Year Mortgage?

Pay roughly 2x more total interest over the life of the loan Higher interest rate than 15-year Takes 30 years to own your home outright Temptation to spend the payment difference instead of investing it

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