15-Year vs 30-Year Mortgage: Which Is Better for You?

The 15-year vs 30-year mortgage decision is one of the most consequential financial choices a homebuyer makes — and most people make it based on the monthly payment alone. That's the wrong way to think about it. The right way is to compare total interest paid, break-even timelines, and what you do with the payment difference.

Here's the complete comparison with real numbers so you can make the decision with math, not instinct.

Use our Mortgage Calculator to model both scenarios with your actual loan amount and current rates.

The Core Numbers: 15-Year vs 30-Year

On a $300,000 loan at current rates (6.5% for 30-year, 5.9% for 15-year — lenders typically offer a 0.5%–0.75% discount on 15-year loans):

	15-Year Mortgage	30-Year Mortgage
Interest rate	5.9%	6.5%
Monthly payment	$2,514/mo	$1,896/mo
Monthly difference	+$618 more	—
Total interest paid	$152,520	$382,560
Interest savings	$230,040	—
Loan paid off	Year 15	Year 30
Equity at year 10	$189,000	$118,000

The 15-year saves $230,040 in interest — but costs $618 more every month for 15 years. That monthly difference is the entire decision.

The Monthly Payment Comparison by Loan Amount

Loan Amount	15-Year Payment (5.9%)	30-Year Payment (6.5%)	Monthly Difference
$150,000	$1,257	$948	$309 more
$200,000	$1,676	$1,264	$412 more
$250,000	$2,095	$1,580	$515 more
$300,000	$2,514	$1,896	$618 more
$350,000	$2,933	$2,212	$721 more
$400,000	$3,352	$2,528	$824 more

The monthly difference grows with loan size. On a $400,000 loan, the 15-year costs $824 more per month — nearly $10,000 per year in additional housing cost.

The Total Interest Comparison: Where the 15-Year Really Wins

Loan Amount	15-Year Total Interest	30-Year Total Interest	You Save
$200,000	$101,680	$255,040	$153,360
$300,000	$152,520	$382,560	$230,040
$400,000	$203,360	$510,080	$306,720

These numbers are staggering. On a $300,000 loan, the 30-year costs $230,040 more in interest over the life of the loan. That's the real cost of a lower monthly payment.

The Investment Argument: What If You Invest the Difference?

Here's where the 30-year can win despite higher interest costs. If you take a 30-year mortgage and invest the $618/month difference instead of paying extra toward a 15-year mortgage:

Investing $618/month for 15 years at 7% average annual return:

• Total contributions: $111,240
• Investment growth: $88,760
• Portfolio value at year 15: $200,000

Compared to the $230,040 in interest saved with the 15-year — the 15-year still wins in this scenario. But at 10% average returns (closer to historical S&P 500 average), the investment portfolio reaches $237,000 — slightly beating the 15-year interest savings.

The honest conclusion: The investment argument for a 30-year is only compelling if you actually invest the difference — which most people don't. Studies consistently show that when given the choice, most homeowners spend the payment difference rather than invest it.

Who Should Choose the 15-Year Mortgage

The 15-year is better when:

• You can comfortably afford the higher payment (under 28% of gross income)
• You're in your 40s or 50s and want to be mortgage-free before retirement
• You have no high-interest debt (the forced savings of a 15-year outperform paying down 20%+ credit card debt only if you're debt-free)
• You want guaranteed, risk-free "returns" in the form of interest savings
• Your income is stable and you don't need cash flow flexibility

Real example: A 45-year-old earning $150,000 with $300,000 to borrow. The 15-year payment is $2,514 — 20% of gross monthly income. Manageable. They'll be mortgage-free at 60, just before retirement. The $230,040 in interest savings is essentially tax-free wealth building. Clear choice: 15-year.

Who Should Choose the 30-Year Mortgage

The 30-year is better when:

• The 15-year payment exceeds 28%–30% of your gross income
• You carry high-interest debt that should be paid first
• Your income is variable (freelance, commission, seasonal)
• You're early in your career with high income trajectory
• You want maximum flexibility — you can always pay extra on a 30-year
• You're buying in a high cost-of-living area where the 15-year isn't feasible

Real example: A 32-year-old earning $85,000 in a competitive market buying a $380,000 home. The 15-year payment is $3,194 — 45% of gross monthly income. Unqualifiable and financially dangerous. The 30-year at $2,402 is 34% of income — workable. Clear choice: 30-year.

The Hybrid Strategy: 30-Year Loan with 15-Year Payments

This is the most overlooked option. Take a 30-year mortgage but make extra principal payments to pay it off in 15 years. You get:

• The lower required payment of a 30-year (cash flow safety net)
• The interest savings of a 15-year payoff timeline
• Flexibility to revert to minimum payment if income drops

On a $300,000 loan at 6.5% (30-year):

• Required payment: $1,896/mo
• To pay off in 15 years: add $618/mo extra principal = $2,514 total
• Same payoff timeline as a 15-year but with built-in flexibility

The catch: your 30-year rate will be ~0.5%–0.75% higher than the 15-year rate. On $300,000, that extra 0.6% costs approximately $1,800/year in extra interest — the price of flexibility. For most buyers with variable income, that's worth it.

State-by-State Impact: Where the Decision Changes

Your state affects this decision through property taxes and home prices. In high-tax states, your total PITI is already higher — making the 15-year payment even more of a stretch.

State	15-yr PITI on $300k	30-yr PITI on $300k	15-yr as % of $80k salary
Alabama	$2,617	$1,999	39%
Florida	$2,722	$2,104	41%
Georgia	$2,717	$2,099	41%
Texas	$2,934	$2,316	44%
New Jersey	$3,084	$2,466	46%
California	$2,696	$2,078	40%

In Texas, a $300,000 home on an $80,000 salary with a 15-year mortgage consumes 44% of gross income — well above the 28% guideline and beyond most lender limits. In Alabama, the same scenario is 39% — still high but potentially qualifiable.

See your state-specific PITI with our Mortgage Calculator and compare it against our Housing Affordability by State report.

All figures use estimated rates. Actual rates vary by lender, credit score, and market conditions. Consult a licensed mortgage professional. Sources: Freddie Mac, Consumer Financial Protection Bureau, Federal Reserve.

Frequently Asked Questions

Is a 15-year or 30-year mortgage better?

A 15-year mortgage is better if you can comfortably afford the higher payment (under 28% of gross income) and want to minimize total interest paid. A 30-year is better if the 15-year payment exceeds your qualification limits, you have variable income, or you want cash flow flexibility. On a $300,000 loan, the 15-year saves $230,040 in total interest but costs $618 more per month. The right answer depends entirely on your income stability and financial goals.

How much more is a 15-year mortgage payment than a 30-year?

On a $300,000 loan, a 15-year mortgage payment is approximately $618/month more than a 30-year mortgage, assuming a 5.9% rate on the 15-year and 6.5% on the 30-year. The monthly difference scales with loan size — $412 more on a $200,000 loan and $824 more on a $400,000 loan. However, the 15-year saves over $230,000 in total interest on a $300,000 loan.

Can I pay off a 30-year mortgage in 15 years?

Yes. You can take a 30-year mortgage and make extra principal payments to pay it off in 15 years. On a $300,000 loan at 6.5%, adding $618/month in extra principal to your $1,896 required payment achieves the same 15-year payoff timeline. The advantage is flexibility — if income drops, you can revert to the minimum $1,896 payment. The disadvantage is a slightly higher interest rate (30-year rates are typically 0.5%–0.75% higher than 15-year).

What credit score do I need for a 15-year mortgage?

The credit score requirements for a 15-year mortgage are the same as a 30-year — a minimum of 620 for conventional loans, 580 for FHA. However, to get the best rate on a 15-year mortgage and maximize your interest savings, aim for 740+. The rate differential between a 620 and 740 credit score can be 0.5%–1.0%, which on a 15-year loan still adds up to tens of thousands in interest.