What interest rate should I expect on a 30-year mortgage in 2025?+
As of 2025, 30-year fixed mortgage rates in the US are in the 6 to 7.5 percent range depending on credit score, down payment, loan amount, and lender. Borrowers with credit scores above 760 and a 20% or greater down payment typically receive the best available rates. Rates adjust weekly based on the 10-year Treasury yield and broader credit market conditions. Use this calculator to model any specific rate before committing.
How does a higher mortgage rate affect my monthly payment?+
On a $300,000 loan over 30 years, every 1% increase in interest rate adds approximately $165 to $175 to the monthly payment and $59,000 to $63,000 to the total interest paid. Moving from 6% to 7% raises the monthly payment from $1,799 to $1,996, a difference of $197 per month. Over 30 years that additional $197 compounds to roughly $70,920 in extra payments, illustrating why negotiating even a small rate improvement saves tens of thousands of dollars.
How do I find what mortgage rate I need for a specific monthly payment?+
Use the Rate Finder mode (Mode 2) in this calculator. Enter your loan amount, target monthly payment, and loan term. The calculator uses a numerical solver (bisection method) to find the annual interest rate that produces exactly your target payment. For example, a $350,000 loan over 30 years with a $2,200 target payment requires a rate of approximately 6.8%. Use this number as your negotiation target when shopping lenders.
Is a 15-year or 30-year mortgage better financially?+
A 15-year mortgage pays off faster and saves dramatically on interest, but requires a 30 to 40 percent higher monthly payment. On a $350,000 loan at 7%, the 30-year payment is about $2,329 and total interest is $488,000. The 15-year payment is about $3,146 and total interest is $216,000, saving $272,000. The 30-year option gives more monthly cash flow flexibility. Choose the 15-year term if you can comfortably afford the higher payment and want to minimise lifetime interest cost.
What is the difference between mortgage interest rate and APR?+
The interest rate is the base cost of borrowing the principal, expressed as an annual percentage. APR (Annual Percentage Rate) adds lender fees including origination charges, discount points, and certain closing costs. APR is always equal to or higher than the interest rate. When comparing offers from multiple lenders, compare APR rather than interest rate alone, since a lower rate with high fees can cost more than a slightly higher rate with minimal fees. This calculator uses the stated interest rate for payment calculations.
How much does one discount point reduce the mortgage rate?+
One discount point costs 1% of the loan amount and typically reduces the rate by 0.125% to 0.25%, though this varies by lender and market conditions. On a $400,000 loan, one point costs $4,000 and at a 0.25% reduction saves approximately $59 per month. The break-even period is $4,000 divided by $59 = 68 months, roughly 5.7 years. Paying points makes financial sense only if you plan to keep the mortgage longer than the break-even period.
How does credit score affect mortgage interest rate?+
Credit score is one of the most significant factors in mortgage rate pricing. The difference between a 620 FICO score and a 760 FICO score can be 0.5 to 1.5 percentage points on the mortgage rate. On a $350,000 loan at 30 years, a 1% rate difference means about $200 more per month and roughly $72,000 more in total interest over the life of the loan. Improving your credit score by 40 to 60 points before applying, by paying down revolving debt and correcting any errors on your credit report, can yield significant long-term savings.
Does the mortgage payment calculator include property tax and insurance?+
No. This calculator computes only the principal and interest (P&I) component of your mortgage payment. A complete housing payment (called PITI) also includes Property Tax, Insurance (homeowners), and often PMI if your down payment is below 20%. Typical property taxes run 0.5 to 2.5% of home value annually depending on location. Homeowners insurance runs 0.5 to 1% annually. Add these amounts to your P&I result from this calculator for a complete monthly housing cost estimate.
What is the best way to get the lowest mortgage rate?+
Shop at least three to five lenders including banks, credit unions, and online lenders. Multiple applications within a 45-day window count as a single credit inquiry, so rate shopping does not hurt your credit score. Improve your credit score before applying, make a 20% or larger down payment to avoid PMI and signal lower risk, choose a shorter loan term (which typically carries a lower rate than the 30-year), and consider paying discount points if you plan to stay in the home long term. The rate spread between the first quote and the best quote is frequently 0.25 to 0.5 percent or more.
How do I calculate total interest paid on a mortgage?+
Total interest equals monthly payment multiplied by the total number of payments, minus the original loan principal. For a $300,000 loan at 7% over 30 years with a $1,996 monthly payment: total paid = $1,996 × 360 = $718,560. Total interest = $718,560 - $300,000 = $418,560. This means you pay $1.40 in interest for every $1.00 of principal borrowed at this rate and term. The ratio improves significantly at lower rates or shorter terms.
What is a rate lock and when should I lock my mortgage rate?+
A rate lock is a lender's commitment to hold a specific interest rate for a defined period (typically 30, 45, or 60 days) while your loan application is processed. Rates can change daily, so locking protects you from increases after you agree on a purchase price. Lock when you are confident the sale will close within the lock period and when rates are at a level you are comfortable with. Rate lock extensions are typically available for a fee if closing is delayed. Waiting to lock is a bet that rates will fall; locking early is a hedge against them rising.