What is included in a mortgage payment?
Most homeowners do not just pay principal and interest on their mortgage — they pay PITI: Principal, Interest, Taxes, and Insurance. Here is what each component covers:
- Principal — the portion of your payment that reduces the loan balance. Over time, as your balance shrinks, more of each payment goes toward principal.
- Interest — the cost of borrowing, calculated as a percentage of your remaining balance. Early in the loan term, most of your payment is interest; later, it shifts toward principal.
- Property taxes — annual taxes levied by your local government, typically 0.5-2.5% of the home value. Your lender collects 1/12 of the annual amount each month and pays the tax bill on your behalf.
- Homeowners insurance — protects your home and belongings from damage, theft, and liability. Lenders require it as long as you have a mortgage. You can shop around for the best rate.
- PMI (Private Mortgage Insurance) — required if your down payment is less than 20% of the home price. PMI protects the lender if you default. Once you reach 20% equity, you can request cancellation.
Our mortgage calculator shows all five components, giving you a complete picture of your monthly housing cost. Use it to compare different loan scenarios — such as how a larger down payment or shorter term affects your payment.
How down payment affects your mortgage
Your down payment is the upfront cash you pay toward the home price. The rest is financed through your mortgage. Down payment size affects three critical factors:
1. Loan amount (and monthly payment)
A larger down payment means a smaller loan, which directly reduces your monthly principal-and-interest payment. On a $350,000 home at 7% over 30 years:
| Down Payment | Loan Amount | P&I Payment | Total Interest |
|---|---|---|---|
| 5% ($17,500) | $332,500 | $2,211 | $463,931 |
| 10% ($35,000) | $315,000 | $2,095 | $439,283 |
| 20% ($70,000) | $280,000 | $1,862 | $390,202 |
2. PMI requirement
If you put down less than 20%, lenders require PMI — typically 0.5-1.5% of the loan amount per year, or $100-250 per month on a $300,000 loan. That is an extra $12,000-$30,000 over ten years. Once you reach 20% equity (through payments or home appreciation), you can request PMI cancellation. To avoid PMI entirely, put down at least 20% or use a piggyback loan structure (such as 80-10-10: 80% first mortgage, 10% second mortgage, 10% down).
3. Interest rate
Larger down payments often unlock better interest rates because they reduce the lender's risk. A 20% down payment may earn you a rate 0.25-0.5% lower than a 5% down payment, saving tens of thousands over the loan term. Enter different down payment amounts in the calculator above to see the total impact on your monthly payment and lifetime interest.
15-year vs 30-year mortgages
The two most common mortgage terms are 15 and 30 years. Each has clear tradeoffs:
| Loan Term | Pros | Cons |
|---|---|---|
| 30-year | Lower monthly payment, more flexibility for investing or emergencies, easier to qualify | Much higher total interest, slower equity build, decades of debt |
| 15-year | Save $100,000+ in interest, own your home faster, lower rates (often 0.5% less), forced savings discipline | Higher monthly payment, less cash flow flexibility, tougher to qualify |
Worked example
On a $280,000 mortgage at 7% for 30 years, your monthly payment is $1,862 and you pay $390,202 in total interest. The same loan at 6.5% for 15 years (15-year loans typically get lower rates) costs $2,439 per month but only $158,991 in total interest — a savings of over $231,000.
If you can afford the higher monthly payment, a 15-year mortgage is one of the best financial moves you can make. If cash flow is tight or you want flexibility to invest extra money elsewhere, a 30-year mortgage with occasional extra payments (which you control) can be a smart middle ground. Use our Loan Payoff Calculator to model how extra monthly payments on a 30-year loan can mimic a 15-year payoff timeline.
How property taxes and insurance work
Property taxes and homeowners insurance are usually paid through an escrow account managed by your lender. Each month, your lender collects 1/12 of the estimated annual cost and holds it in escrow. When the tax bill or insurance premium is due, the lender pays it on your behalf.
- Property taxes vary widely by location — from under 0.5% in Hawaii to over 2% in New Jersey. Check your county's tax rate and multiply it by the home value to estimate your annual bill. Taxes typically increase over time as property values rise.
- Homeowners insurance depends on your home's value, location, age, and coverage level. Expect $800-$2,000+ per year for a typical single-family home. You can shop around — you are not required to use the lender's recommended insurer.
Escrow accounts are convenient — you avoid large lump-sum bills — but you lose some control. The lender reviews your escrow balance annually and adjusts your monthly payment up or down based on actual costs. If you prefer to manage taxes and insurance yourself (and save on potential escrow fees), some lenders allow you to waive escrow once you have at least 20% equity.
How much house can you afford?
Lenders use the 28/36 rule to decide how much mortgage you qualify for:
- 28% rule — your total housing payment (PITI) should not exceed 28% of your gross monthly income.
- 36% rule — your total debt payments (housing + car loans + student loans + credit cards + other obligations) should not exceed 36% of your gross monthly income.
Example
If you earn $6,000/month gross, you should keep your housing payment under $1,680 (28%) and total debt under $2,160 (36%). If you already have $400/month in non-housing debt, your housing payment should not exceed $1,760.
These are lender guidelines, not necessarily what you should spend. Many financial advisors recommend staying well below the 28% threshold — especially in high-cost-of-living areas or if you have variable income. Factor in maintenance, utilities, HOA fees, and emergency repairs (budget 1-2% of home value per year). Just because you qualify for a $500,000 mortgage does not mean you should stretch to buy a $500,000 home.
Use this calculator to model different home prices, down payments, and rates. Find a monthly payment you are comfortable with, then work backward to see what home price fits your budget.
How extra payments cut total interest
Just like any amortized loan, extra principal payments on a mortgage reduce your total interest and shorten your payoff timeline. Even small extra payments add up over decades:
Worked example
On a $280,000 mortgage at 7% over 30 years, your standard payment is $1,862 per month. You will pay $390,202 in total interest. Here is how extra payments change the outcome:
| Extra Payment | Payoff Time | Total Interest | Savings |
|---|---|---|---|
| $0 (standard) | 30 years | $390,202 | — |
| $100/month | 25.8 years | $337,891 | $52,311 |
| $200/month | 22.7 years | $297,042 | $93,160 |
| $300/month | 20.4 years | $264,738 | $125,464 |
An extra $100/month — roughly the cost of a few streaming subscriptions — saves you over $52,000 and gets you out of debt four years early. Use our Loan Payoff Calculator to model your exact mortgage and see the impact of extra payments. If your loan has no prepayment penalty (most modern mortgages do not), extra payments are one of the safest, highest-return uses of extra cash.
Related calculators
Once you understand your mortgage payment, explore these related tools:
- Loan Payoff Calculator — model your mortgage with extra payments to see exactly how much sooner you can own your home.
- Auto Loan Calculator — calculate monthly car payments and total interest for your next vehicle purchase.
Armed with these tools and the knowledge above, you can confidently shop for a mortgage, negotiate rates, and plan a payoff strategy that fits your financial goals. A mortgage is likely the largest debt you will ever take on — take the time to understand it fully.