Last updated: July 2026

Most mortgage calculators tell you a number. This one helps you understand what that number actually means for your budget and what would change it.

Enter your loan details below to get your estimated monthly payment, including principal, interest, property taxes, homeowners insurance, and PMI. Then keep scrolling: we’ll show you how each factor moves your payment, how a 15-year stacks up against a 30-year loan side by side, and how to shave real money off your total cost.

Quick answer: On a $350,000 loan at 6.5% over 30 years, your principal and interest payment is about $2,212/month. Add typical taxes and insurance, and total monthly cost usually lands between $2,600–$2,900, depending on your state.

What This Calculator Does Differently

A basic mortgage calculator only multiplies a loan amount by an interest rate. This one is built to answer the real question people have: “Can I actually afford this, and what happens if something changes?” That’s why it includes:

Full PITI breakdown (Principal, Interest, Taxes, Insurance) not just principal and interest
PMI calculation for down payments under 20%
A month-by-month amortization schedule you can scroll through
The ability to instantly compare a 15-year vs. 30-year fixed-rate mortgage
Adjustable inputs so you can test “what if my rate goes up 0.5%?” in real time

This is the difference between a simple mortgage calculator and a genuine mortgage affordability calculator one just does math, the other helps you make a decision.

The Formula Behind Every Mortgage Calculator (Explained Simply)

Every accurate mortgage payment calculator, ours included, runs on the same industry-standard formula:

M = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]

M = monthly principal & interest payment
P = loan amount
r = monthly interest rate (annual rate ÷ 12)
n = total number of payments (years × 12)

In plain English: this formula locks in equal monthly payments for the life of your loan, but silently shifts the mix mostly interest at first, mostly principal by the end. That shifting mix is called amortization, and it’s the part most calculators show you but don’t explain. We break it down further below.

15-Year vs. 30-Year Mortgage: Side-by-Side

This is one of the most searched mortgage decisions, and the honest answer is: it depends on whether you’re optimizing for monthly cash flow or total cost. Here’s what that trade-off actually looks like on a $350,000 loan:

	30-Year Fixed at 6.5%	15-Year Fixed at 6.0%
Monthly principal & interest	~$2,212	~$2,954
Total interest paid	~$446,000	~$181,700
Total repaid	~$796,000	~$531,700
Builds equity	Slower	~2x faster

Quick takeaway: the 15-year loan costs about $742/month more but saves roughly $264,000 in interest over the life of the loan. If your budget can absorb the higher payment, the long-term savings are substantial. If not, the 30-year gives you breathing room and you can always pay extra toward principal later without being locked into the higher required payment.

(Design note: this table is a strong featured-snippet and AI Overview candidate keep it as a clean HTML table, not an image.)

How to Use This Mortgage Calculator

Enter your home price and down payment (or the loan amount directly).
Input your interest rate use your lender’s quote, or a current market average if you’re still shopping.
Select your loan term (15, 20, or 30 years).
Add property tax and homeowners insurance estimates for your area.
Include PMI if your down payment is under 20%.
Click Calculate then adjust any field to instantly see how your payment changes.

Every recalculation is instant and free, with no limit on how many scenarios you can test.

What Actually Makes Up Your Monthly Payment (PITI)

Quick answer: your full mortgage payment is almost never just “principal and interest” it’s four parts working together, commonly abbreviated PITI.

Principal pays down the amount you borrowed and builds your equity.
Interest the lender’s cost for the loan, calculated on your remaining balance.
Taxes property taxes collected by your local government, often paid monthly into an escrow account.
Insurance homeowners insurance required by your lender to protect the property.

If your down payment is under 20%, add a fifth line: PMI (Private Mortgage Insurance), which protects the lender, not you, until you reach 20% equity.

Skipping taxes and insurance is the single biggest reason people underestimate their real monthly cost which is why this calculator includes them by default instead of as an afterthought.

PMI: What It Costs and How to Avoid It

Quick answer: PMI typically costs 0.3%–1.5% of your loan amount per year, and it disappears once you hit 20–22% equity.

If a 20% down payment isn’t realistic right now, you have three main options:

Pay PMI and have it automatically removed at 22% equity by federal law (you can request removal at 20%).
Use a lender-paid PMI structure, which folds the cost into a slightly higher rate instead of a separate monthly line sometimes cheaper long-term, sometimes not, so compare both.
Explore loan programs that avoid PMI entirely, like certain VA loans for eligible veterans, which require no mortgage insurance regardless of down payment.

Amortization: How Your Balance Actually Shrinks

Quick answer: amortization is the schedule showing how each payment splits between interest and principal and why that split changes every month.

Here’s a simplified look at how the mix shifts over a 30-year loan:

Loan Year	Approx. % to Interest	Approx. % to Principal
Year 1	~78%	~22%
Year 10	~62%	~38%
Year 20	~36%	~64%
Year 30	~4%	~96%

This is why paying even a small amount extra toward principal in the early years has an outsized effect it skips ahead in a schedule that’s otherwise weighted heavily toward interest.

(Design note: this is a great candidate for an actual line chart in the calculator UI most competitor tools use one, and pages without a visual here tend to underperform on engagement.)

Rent vs. Buy: When a Mortgage Actually Makes Sense

This is a common next question after “what’s my payment,” so it’s worth addressing directly. Quick answer: buying tends to make more financial sense than renting once you plan to stay in the home for roughly 4–5 years or longer, since closing costs and the early-amortization interest weighting take time to offset with built equity.

Key factors to weigh:

How long you’ll stay shorter timelines favor renting; longer timelines favor buying.
Closing costs typically 2–5% of the purchase price, a sunk cost you don’t recover quickly.
Market conditions in high-appreciation markets, buying can pay off faster; in flat or declining markets, renting may be safer short-term.
Maintenance and opportunity cost owning means covering repairs and upkeep, but also building equity instead of paying a landlord’s mortgage.

(If you build a linked Rent vs. Buy calculator, this is the natural internal-link anchor.)

Closing Costs: The Number People Forget to Budget For

Quick answer: closing costs typically run 2–5% of your loan amount and are due upfront, separate from your down payment.

Common closing costs include:

Loan origination fees
Appraisal and inspection fees
Title insurance and search fees
Prepaid property taxes and insurance (escrow setup)
Attorney and recording fees (varies by state)

On a $350,000 loan, that’s roughly $7,000–$17,500 due at closing on top of your down payment. Budgeting for this separately is one of the most common gaps in first-time buyer planning.

Refinancing: When It’s Actually Worth It

Quick answer: refinancing typically makes sense when you can lower your rate by at least 0.5–1%, and you plan to stay in the home long enough to clear your break-even point.

To find your break-even point:

Break-even (months) = Total refinance closing costs ÷ Monthly payment savings

If refinancing costs $6,000 and saves you $200/month, your break-even point is 30 months. If you plan to stay in the home longer than that, refinancing likely pays off. If you’re planning to move sooner, it may not.

Fixed-Rate vs. Adjustable-Rate Mortgages (ARM)

Quick answer: a fixed-rate mortgage locks your rate for the full loan term; an ARM starts with a lower fixed rate for a few years, then adjusts periodically based on the market.

	Fixed-Rate Mortgage	Adjustable-Rate Mortgage (ARM)
Rate stability	Locked for full term	Fixed initially, then variable
Best for	Staying long-term, want predictability	Staying short-term, comfortable with risk
Starting rate	Usually higher than ARM	Usually lower initially
Long-term risk	None (rate never changes)	Payment can rise after fixed period ends

A fixed-rate mortgage calculator like this one is the right tool for the vast majority of buyers, since ARMs carry payment uncertainty that’s harder to project reliably.

Factors That Affect Your Mortgage Payment

Loan amount larger loans mean larger payments.
Interest rate even a 0.5% shift changes your payment meaningfully.
Loan term longer terms lower monthly cost but raise total interest.
Down payment bigger down payments shrink your loan and may remove PMI.
Credit score directly affects the rate you’re offered.
Property location drives your tax and insurance costs.
Loan type conventional, FHA, VA, and USDA loans all price differently.

7 Ways to Lower Your Monthly Mortgage Payment

Increase your down payment to shrink your loan amount and possibly avoid PMI.
Improve your credit score before applying even a 20-point jump can lower your rate.
Compare at least 3–5 lenders rates and fees vary more than most buyers expect.
Ask about discount points paying upfront to buy down your rate can pay off if you’re staying long-term.
Choose a longer term if monthly cash flow matters more than total interest cost.
Shop insurance separately your lender’s suggested provider isn’t always the cheapest.
Appeal your property tax assessment if you believe your home is over-assessed this is underused and can meaningfully lower PITI.

Types of Loans You Can Estimate With This Tool

Conventional home purchase loans
Refinance loans (rate-and-term and cash-out)
Investment property loans
Commercial real estate loans
Fixed-rate and adjustable-rate mortgages

Frequently Asked Questions

Is this mortgage calculator free to use?

Yes. It’s completely free, with no registration or email required.

How accurate is a mortgage calculator?

It’s highly accurate for principal, interest, taxes, and insurance based on the numbers you enter. Your final approved rate and fees can only be confirmed by a licensed lender.

What is included in a monthly mortgage payment?

A full payment typically includes principal, interest, property taxes, and homeowners insurance (PITI), plus PMI if your down payment is under 20%.

How do I calculate my mortgage payment manually?

Use the formula M = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1], where P is loan amount, r is monthly interest rate, and n is total payments. Most people use a calculator instead of doing this by hand.

What’s the difference between interest rate and APR?

Your interest rate is the pure cost of borrowing. APR adds in certain lender fees and closing costs, giving a fuller picture of your loan’s true annual cost.

How much house can I afford?

A common guideline caps total housing costs at 28% of gross monthly income, though your true comfort level depends on your other debts and savings goals.

Should I get a 15-year or 30-year mortgage?

Choose 15 years if you can handle a higher payment and want to save significantly on interest. Choose 30 years if lower monthly payments and flexibility matter more right now.

What is PMI and when does it go away?

PMI is required when your down payment is under 20%. It can be requested for removal at 20% equity and is automatically canceled at 22% equity.

Does this calculator include taxes and insurance?

Yes this is a full mortgage calculator with taxes and insurance included, not just principal and interest.

How is mortgage amortization calculated?

Each payment first covers accrued interest on your remaining balance; the rest reduces your principal. Over time, as the balance shrinks, more of each payment goes to principal.

Is it better to rent or buy?

Buying generally makes more financial sense if you plan to stay 4–5 years or longer, since closing costs and early interest weighting take time to offset.

When does refinancing make sense?

Generally when you can lower your rate by 0.5–1% or more and you’ll stay in the home past your break-even point (closing costs ÷ monthly savings).

What are typical closing costs?

Usually 2–5% of your loan amount, covering fees like origination, appraisal, title insurance, and prepaid escrow.

Fixed-rate or ARM which is better?

Fixed-rate mortgages are better for most buyers who want payment predictability. ARMs can make sense for buyers planning to move or refinance before the fixed period ends.

Can first-time buyers use this calculator?

Yes it’s built for first-time buyers, repeat buyers, refinancers, and investors alike.

A Note on Accuracy

This tool provides an estimate based on standard mortgage amortization math and the figures you enter. It is not a loan offer, pre-approval, or guarantee of terms. Always confirm final numbers with a licensed mortgage lender.

For further reading, see the Consumer Financial Protection Bureau’s homebuying guide and the Federal Reserve’s mortgage resources.

Try It Now

Run your numbers through the calculator above, then explore what changes them a bigger down payment, a shorter term, or a better rate. Small adjustments can save you tens of thousands of dollars over the life of your loan.

Related tools: EMI Calculator · Refinance Calculator · Rent vs. Buy Calculator · Home Affordability Calculator

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