Mortgage
How to Calculate Your Mortgage Payment in 2026 (With Real Numbers)
Short answer
use M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1], where P is the loan amount, r the monthly rate and n the number of payments. On a $400,000 home with 20% down ($320,000 loan) at 6.9% for 30 years, principal and interest come to $2,107 a month. Adding property taxes and insurance brings the full payment to about $2,624.
On a $400,000 home with 20% down and a 30-year fixed at 6.9%, your principal and interest payment is $2,107/month. Add taxes and insurance and the real number is closer to $2,624. Most buyers lock in a rate without running the full PITI — that’s the gap that breaks budgets.
The $400,000 Mortgage — Payment Line by Line
One formula drives every mortgage payment:
M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1]
- P = loan principal (purchase price minus down payment)
- r = monthly interest rate (annual rate ÷ 12)
- n = total payments (years × 12)
Real numbers: $400,000 home, 20% down = $80,000. Loan principal P = $320,000. Rate 6.9% ÷ 12 = r = 0.00575. 30-year term = n = 360.
Run the formula and you get $2,107/month. That’s principal and interest only. Taxes and insurance come next.
📊 $320,000 Loan — 2026 Mortgage Payment Snapshot
30-yr @ 6.9% 15-yr @ 6.3% 20-yr @ 6.6% Monthly P&I $2,107 $2,752 $2,405 Total interest paid $438,707 $175,447 $257,131 Payoff year 2056 2041 2046 Estimated · Freddie Mac PMMS rate trends, May 2026 · Principal $320,000
Quick math: $320,000 loan → $2,107/month P&I — $25,290/year, or about $973 per bi-weekly period ($25,290 ÷ 26). Estimated · 2026 market rates · 20% down · standard amortization.
The 15-year option costs $645 more each month. But it saves $263,260 in total interest. That’s the trade-off.
What PITI Actually Costs You
P&I is $2,107. Three more costs complete the real payment.
Property taxes average 1.1% of home value nationally, per the Tax Foundation. On a $400,000 home that’s $4,400/year — $367/month. County rates vary hard. New Jersey averages 2.2%; Hawaii averages 0.3%. Check your county assessor before you sign.
Homeowner’s insurance runs $1,200–$2,000/year for most single-family homes. Call it $150/month as a baseline. Florida and Gulf Coast markets run higher.
PMI applies if you put down less than 20%. It typically costs 0.5%–1.5% of the loan annually. On $320,000 at 1%, that’s $267/month until you cross 20% equity.
Most people buying a $400,000 home with 20% down in a mid-cost city like Columbus, Ohio don’t realize their property tax bill alone adds more to PITI than their homeowner’s insurance and utilities combined.
📊 Full PITI — $400,000 Home, 20% Down, Columbus OH, 30-Year @ 6.9%
Expense Est. monthly Source Principal & interest $2,107 Calculated Property taxes (Franklin County, 1.7%) $567 Franklin County Auditor Homeowner’s insurance $150 Industry avg PMI (20% down — not applicable) $0 N/A Utilities (gas, electric, water) $220 BLS CES Total PITI + utilities $3,044 Left over on $112k gross income (pre-tax) $6,289/mo Estimates for a single homeowner. PITI burden (excluding utilities): $2,824 = 30.3% of $9,333/mo gross.
That PITI burden of 30.3% sits above the 28% front-end limit most conventional lenders use. Approvable only with a lender that allows a higher ratio, a bigger down payment, or more income.
How the Rate Changes Your Payment
A 1% rate difference on a $320,000 loan (6.9% vs. 7.9%) costs $218/month. Over 30 years, that’s about $78,570. No rounding error.
Estimated monthly P&I — $320,000 loan, 30-year fixed (2026):
- 🟢 Texas — $1,919/mo @ 6.0% (no state income tax; lower jumbo pressure)
- 🟢 Florida — $1,970/mo @ 6.25% (no income tax; higher insurance costs)
- 🟡 Ohio — $2,107/mo @ 6.9% (moderate property taxes)
- 🟡 Georgia — $2,076/mo @ 6.75% (flat state income tax)
- 🔴 California — $2,237/mo @ 7.5% (high-balance loan pressure; high state income tax)
- 🔴 New York — $2,281/mo @ 7.7% (city surcharge in NYC; property taxes 1.7% avg)
Source: Freddie Mac Primary Mortgage Market Survey + state revenue depts.
Rates fluctuate weekly. The PMMS is the most consistent benchmark available — check it before locking.
Quick Answers About Mortgage Payments in 2026
What’s the monthly payment on a $300,000 mortgage? At 6.9% on a 30-year fixed, that’s $1,976/month in principal and interest. Add taxes and insurance and you’re realistically at $2,350–$2,550 depending on your county’s property tax rate.
How much income do I need for a $400,000 home? Using the 28% front-end DTI rule and a PITI of $2,624/month (P&I + taxes + insurance), you need at least $9,371/month gross — about $112,500/year before taxes.
Does 10% down vs. 20% down change the payment much? On a $400,000 home, 10% down means a $360,000 loan. At 6.9%, that’s $2,371/month P&I — $264 more than with 20% down. PMI adds another $150–$300/month on top. The combined gap is $414–$564/month.
What’s the real difference between a 15-year and 30-year mortgage? On a $320,000 loan at current rates — 6.9% for 30-year, 6.3% for 15-year — the 15-year costs $645/month more. You save roughly $263,000 in interest and own the home 15 years sooner.
How does my property tax rate affect PITI? It’s the most overlooked variable. A 1% property tax rate on a $400,000 home adds $333/month. A 2.2% rate (New Jersey average) adds $733/month. Same purchase price, $400/month difference in PITI — before any other costs.
Three Moves That Lower Your Total Cost
1. Buy discount points. One point costs 1% of the loan upfront — $3,200 on a $320,000 loan. It typically drops your rate by 0.25%. At 6.9% → 6.65%, your payment falls from $2,107 to $2,054. That’s $53/month saved. Break-even: 60 months. Worth it if you’re staying 5+ years.
2. Make one extra payment per year. Apply $2,107 extra once annually, directed to principal. On a 30-year loan, that cuts roughly 6 years off the term. Total interest saved: around $102,000. No refinance. No closing costs.
3. Recast instead of refinancing. Got a bonus or inheritance? Apply a lump sum ($10,000 minimum at most servicers) to principal, then ask for a recast. The servicer recalculates your payment at the original rate. Lower payment, no credit pull, no closing costs.
💡 Estimated Monthly Cost: Baseline vs. Strategies — $320,000 Loan
Scenario Monthly P&I Total interest vs. Baseline Baseline (30-yr @ 6.9%) $2,107 $438,707 — + 1 discount point (6.65%) $2,054 $419,544 –$19,163 + 1 extra payment/year $2,107 ~$336,800 –$101,874 15-year @ 6.3% $2,752 $175,447 –$263,260 Estimated · Rate assumptions based on Freddie Mac PMMS, May 2026
FAQ
What’s the exact formula for a mortgage payment?
M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1]. P is the loan principal, r is the monthly interest rate (annual rate divided by 12), and n is total payments (years times 12). On a $320,000 loan at 6.9% for 30 years, that comes out to $2,107/month. Every mortgage calculator runs this same equation — the math doesn’t change, only the inputs do.
Why does my balance barely drop in the early years?
Amortization front-loads interest. In month one of a $320,000 loan at 6.9%, roughly $1,840 of your $2,107 payment goes to interest — only $267 reduces the principal. By year 20, that flips. It’s not a lender trick. It’s how compound interest works when the balance is highest. An amortization schedule shows the full picture year by year.
Does refinancing always save money?
No. Closing costs run 2%–5% of the loan — $6,400 to $16,000 on a $320,000 balance. If a rate drop saves $150/month, break-even is 43–107 months. Sell or refinance again before that and you’ve lost money on the deal. Use our refinance calculator to run the break-even number before committing.
What if I’m self-employed — does qualifying change?
The payment formula is identical. What changes is how lenders verify income. Self-employed borrowers typically need two years of tax returns, and lenders use net income after deductions — not gross revenue. If your business writes off a lot, qualifying income may be significantly lower than what you actually bring home. Use our self-employment tax calculator to see your net picture first — SE tax adds 14.13% on net earnings, which catches a lot of people off guard.
How do I know if I can actually afford the payment?
Two ratios matter. Front-end DTI: PITI divided by gross monthly income, target under 28%. Back-end DTI: all debt payments divided by gross income, target under 36%–43% depending on loan type. On a $400,000 home with $2,624 PITI, you need $9,371/month gross for the front-end alone. A car payment or student loan tightens the back-end limit further.
Check Your Exact Scenario
The calculator at the top handles any loan amount, rate, and term — and shows the full amortization schedule. For the bigger picture:
- Mortgage Affordability Calculator — how much house can you buy on your income?
- Refinance Calculator — does a rate drop actually save money after closing costs?
- Rent vs. Buy Calculator — is buying cheaper than renting in your market right now?
Estimates, not advice. CalcWyse figures are based on the assumptions stated on this page (how we calculate). Rates, fees and terms vary by lender and change often. Get a quote from a licensed lender or adviser before you commit.