Yes. When you work with Duane Buziak at Mortgage Shopping (Supra Mortgages / Duane Buziak Mortgage Maestro), you can see the total cost difference between a 15-year and a 30-year mortgage side by side: monthly payment, total interest, and total paid over the life of each loan. The gap is usually large. On a $400,000 loan, the illustration below puts it near $300,000 in interest.
That gap tells you what each term costs. It does not tell you which term fits your life. A lower payment is not a cheaper loan, and the cheapest loan is not always the right one. A NoTouch Credit Process pre-qualification is the first step, because it lets you start the comparison without a credit inquiry.
Yes, the Total Cost Gap Between Terms Can Be Shown Side by Side
Duane Buziak builds term comparisons as a strategy review, not a posted table of rates. Each option starts from a Loan Estimate, the standardized three-page form that itemizes a loan’s payment, interest, and closing costs. The Consumer Financial Protection Bureau explains how to read a Loan Estimate, and it is the document both terms are measured against so the comparison is like for like.
A useful comparison includes:
- Principal and interest payment (P&I): the monthly amount before taxes and insurance.
- Total interest: everything paid to borrow, over the full term.
- Cash to close: down payment plus closing costs under each structure.
- Payoff date: when the balance reaches zero.
- An extra-payment scenario: the 30-year loan with a fixed additional amount applied to principal each month.
Starting with a NoTouch Credit Process pre-qualification lets you explore these numbers without a hard inquiry hitting your credit. A hard pull is needed only once you choose a structure and move toward a formal application.
Two kinds of borrowers tend to get the most from this view. Move-up buyers, who often carry equity from a prior home, are weighing monthly cash flow against decades of interest and want to see the trade-off in dollars. Self-employed borrowers often have income that varies from year to year, so a lower required payment can be worth real money even if the total cost is higher. For them, the term question is partly a question about risk.
Why Term Length Changes Total Interest So Dramatically
The mechanism is amortization: the schedule by which each payment is split between interest and principal. Interest is charged on the remaining balance. On a 30-year loan the balance falls slowly, so early payments are mostly interest and only a small slice reduces what you owe. A 15-year loan with the same balance sends far more of each payment to principal from month one, so the balance, and the interest charged on it, shrinks faster. The CFPB’s home-buying resources cover these mechanics in more detail.
Shorter terms usually carry a lower interest rate than longer ones, but that is not the main driver. The main saving comes from making half as many payments and giving interest half as long to accumulate. Rate spreads between terms vary by market and by borrower, so any difference should be checked as of the date of your quote rather than assumed.
It also helps to separate two measures that people often blur:
- Monthly cost is what the loan demands from your budget each month.
- Total cost is what the loan takes from you over its life.
The 30-year wins the first measure and the 15-year usually wins the second. The 15-year payment also has to fit inside debt-to-income (DTI) limits, the ratio of your monthly debt obligations to gross monthly income. A higher payment raises your DTI, and for some buyers that decides the question before preference does.
Finally, there is opportunity cost. Every dollar sent to a higher payment is a dollar not held as reserves, not invested, and not available for renovations, tuition, or a business. A buyer with a strong emergency fund and maxed retirement contributions weighs that differently than one with thin savings. Neither answer is wrong; they are answers to different situations.
Worked Example: $400,000 Loan at 15 Years vs. 30 Years
The rates below are illustrative, not current quotes, and they assume a 15-year fixed at 6.0% and a 30-year fixed at 6.5% on a $400,000 balance. Principal and interest only; taxes, insurance, and mortgage insurance are excluded.
The payment formula is P = L × r ÷ (1 − (1 + r)−n), where L is the loan amount, r is the monthly rate, and n is the number of payments.
- 15-year at 6.0%: r = 0.005, n = 180. Monthly P&I is about $3,375. Total paid is 180 × $3,375 ≈ $607,500. Total interest is about $207,500.
- 30-year at 6.5%: r ≈ 0.005417, n = 360. Monthly P&I is about $2,528. Total paid is 360 × $2,528 ≈ $910,000. Total interest is about $510,000.
The monthly difference is $3,375 − $2,528 = $847. The interest difference is roughly $510,000 − $207,500 = $302,500, so the 30-year costs about $300,000 more over its full life.
Now the 30-year borrower makes a choice. If that $847 goes to the loan as extra principal every month, the payment becomes about $3,375 on a 6.5% balance, and the loan pays off in roughly 15.8 years with about $241,500 in total interest. That is about $34,000 more than the true 15-year loan, but about $268,500 less than the unmodified 30-year, and the borrower can drop back to $2,528 in any month that money is needed. If the $847 is instead invested, the outcome depends entirely on returns and discipline, which no loan estimate can promise.
Plain-language read: the 15-year wins on total cost if the payment is comfortable. The 30-year wins on flexibility, and with disciplined prepayment it recovers most of the savings.
Duane Buziak, NMLS #1110647
Term Strategies Side by Side: Where Each Structure Fits
These are strategies and programs, not rate quotes. Each entry lists the best fit, the primary advantage, and the trade-off to evaluate.
- 15-year fixed. Best fit: buyers with strong, stable income and healthy reserves. Advantage: the lowest total interest and the fastest equity build. Trade-off: the highest required payment and the tightest DTI.
- 30-year fixed. Best fit: buyers prioritizing cash flow or qualifying margin. Advantage: the lowest required payment. Trade-off: the highest total interest if held to term.
- 30-year with extra principal payments. Best fit: borrowers who want savings with an escape hatch, including self-employed borrowers with uneven income. Advantage: payoff speed you control. Trade-off: it depends on discipline, since nothing forces the extra payment.
- 20-year or other custom term. Best fit: buyers for whom 15 years is too tight and 30 feels too long. Advantage: a middle path on payment and interest. Trade-off: availability and pricing vary, so it needs a specific quote.
- Adjustable-rate option for a short expected stay. Best fit: buyers confident they will sell or refinance within the fixed period. Advantage: a lower initial payment. Trade-off: payment risk if plans change and the rate resets.
- FHA or VA 30-year. Best fit: buyers using those programs, for example with limited down payment or military service. Advantage: program-specific flexibility. Trade-off: program costs such as FHA mortgage insurance or the VA funding fee affect total cost. See HUD’s FHA loan information and VA home loan benefits.
Some programs change which term is practical. Down payment assistance such as Dynamo DPA (2.5% or 3.5%, 580 FICO minimum) or Turbo DPA (3.5% or 5%, 600 FICO minimum) is usually paired with a 30-year structure, because the buyer’s priority is entry cost and payment. Jumbo loans above the 2026 conforming limit of $806,500 (up to $1,209,750 in high-cost areas, per FHFA) often make a 15-year payment very large in absolute dollars. DSCR investment loans qualify on property cash flow, so a shorter term can fail the rent-to-payment test even when the investor could afford it personally.
Choosing Your Term: Questions That Decide It
Rocket Mortgage and Movement Mortgage both advertise 15-year and 30-year options, which tells you the term decision is universal. What differs is the fit, and three tests settle most cases.
Can you carry the higher payment and keep reserves?
Run the 15-year payment through your DTI, then ask what remains afterward. Many advisors suggest holding several months of expenses in reserve after closing; a loan that qualifies on paper but leaves you with an empty account is the wrong structure. In the example above, the extra $847 a month is $10,164 a year that must come from somewhere.
How long will you realistically stay?
Interest savings accrue over time. If you expect to move in five to seven years, you will not collect most of the 15-year advantage, because early payments on either term are mostly interest and the principal gap is still small. A longer expected stay raises the value of the shorter term.
Would a 30-year with extra payments get you most of the way?
As the example shows, matching the 15-year payment on a 30-year loan captured most of the interest savings while keeping the option to pay less. The cost is a higher rate on that loan and the discipline to stay on schedule. Recompute any figure against your own Loan Estimate before relying on it.
Refinancing is a later lever. You can start in a 30-year and move to a shorter term when income rises, but a refinance carries its own closing costs, and those must be recovered through savings before the move makes sense. A NoTouch Credit Process pre-qualification lets you test that math before committing to anything.
Frequently Asked Questions About 15-Year and 30-Year Costs
Does mortgage.shopping show the total cost difference between a 15-year and 30-year mortgage?
Yes, through a side-by-side comparison from Duane Buziak. It shows monthly payment, total interest, and total paid for each term, built from a Loan Estimate for each option.
Is a 15-year mortgage always cheaper overall?
No, though it usually costs less in total interest. If the payment strains your budget or forces you to drain reserves or take on other debt, the real cost can exceed the interest saved.
Can I pay off a 30-year mortgage early?
Generally yes. Many mortgages allow extra principal payments without penalty, but confirm the terms of your specific loan before relying on that.
How does 15-year versus 30-year work for a jumbo loan?
The same math applies, but larger balances make the 15-year payment much higher in dollars. Loans above the $806,500 conforming limit in most areas are jumbo, so reserve and DTI requirements deserve extra attention.
What term options exist on FHA loans?
FHA loans are commonly offered in 15-year and 30-year fixed terms. Mortgage insurance is part of the total cost, so compare terms with it included.
What term options exist on VA loans?
VA loans offer both shorter and longer fixed terms, with the 30-year the most common. The VA funding fee affects total cost, with exemptions for some borrowers.
Which term do DSCR investors usually choose?
Most choose a 30-year, because the lower payment improves the property’s debt service coverage ratio. A shorter term can raise the payment past what the rent supports.
Can a self-employed borrower qualify for a 15-year mortgage?
Yes, if documented income supports the higher payment. Because self-employed income can vary, some borrowers choose a 30-year and prepay when cash flow allows.
Can I refinance from a 30-year to a 15-year later?
Yes, provided you qualify at that time. Closing costs apply, so compare them against the interest you expect to save before proceeding.
How does pre-qualification work with the NoTouch Credit Process?
It lets you review your options and term comparisons without a credit inquiry. A hard pull comes later, only if you decide to move forward.
Requesting Your Own Side-by-Side Term Comparison
The gap between a 15-year and a 30-year mortgage is real and measurable, and the only way to know what it means for you is to see both loans built from your numbers. Stop overpaying on your mortgage by understanding what each structure costs before you commit. Talk to Duane today for a no-obligation comparison with no credit impact through a NoTouch Credit Process pre-qualification, and see how an independent mortgage broker lays out the total cost of each term.