Free Mortgage Calculator

When people say, "My mortgage would be $1,800 a month," my first question is: does that mean the loan payment, or does that mean the whole housing payment? Because those are not always the same number.

You can calculate principal and interest and think, "Okay, I can handle that." Then property taxes show up. Homeowners insurance gets added. Maybe there is PMI. Maybe the neighborhood has an HOA. Now the number leaving your account every month looks very different from the number you originally calculated.

That is exactly what this Mortgage Calculator is supposed to prevent. The goal is not just "how much is the loan payment?" The better question is: what does this particular mortgage and home-cost scenario look like from beginning to end?

Mortgage Calculator vs Home Affordability Calculator

These two calculators should not answer the same question. If you are asking, "I make $85,000 a year and have a car payment. How much house might fit?" use the Home Affordability Calculator. That tool looks at the income and recurring-debt side.

This Mortgage Calculator starts later in the process. Maybe you're already looking at a $350,000 house, 20% down, a 30-year mortgage, and a 6.75% rate scenario, and you want to know: what would that actually cost? That's what this page is for.

Four Different Questions, Four Different Calculators

Text equivalent: this page (Mortgage Calculator) answers what a specific mortgage will cost. The Home Affordability Calculator answers how much house might fit your income and debts. The Down Payment Calculator answers how much cash you need upfront. The Amortization Calculator answers where every individual loan payment goes.

Start With the Amount You Are Actually Borrowing

Let's say the home price is $350,000. You plan to put $70,000 down. Your starting mortgage principal is $350,000 minus $70,000, which equals $280,000. That $280,000 is the amount being used in the principal-and-interest calculation before any other financed items that may apply to an actual loan.

If you're still trying to figure out how much cash you want to put down in the first place, use the Down Payment Calculator.

What Are Principal and Interest?

Principal is the amount you borrowed. Interest is the cost of borrowing that money. For a typical fixed-rate amortizing mortgage, the calculator uses the loan amount, interest rate, and number of monthly payments to determine a monthly principal-and-interest payment.

Let's use our $280,000 example. At 6.75% for 30 years, the principal-and-interest payment is approximately $1,816.07 per month. If you stopped there, though, you still might not know what the house actually costs you monthly.

What Is PITI?

You may hear the term PITI. That stands for principal, interest, taxes, insurance. CFPB describes these as the four basic components commonly associated with a monthly mortgage payment.

Suppose your loan payment is $1,816.07. Annual property tax is $3,500. Annual homeowners insurance is $1,200. Monthly property tax is about $291.67. Monthly homeowners insurance is $100. Now the estimated monthly amount becomes approximately $2,207.74. That's already almost $392 more than principal and interest alone, and we still haven't added PMI or HOA fees. That's why I want this calculator showing both numbers separately.

The $1,800 Mortgage That Isn't Really $1,800

Text equivalent (illustrative example): a $1,816 loan payment plus $292 property tax plus $100 homeowners insurance plus any PMI or HOA equals the estimated full monthly housing payment, about $2,208 in this example. Calculate your own scenario above to see your actual numbers here.

Why Your Mortgage Quote Can Look Smaller Than Your Housing Payment

Sometimes people hear, "Your mortgage payment is about $1,800." What they are really hearing is the principal-and-interest calculation. CFPB specifically warns buyers not to stop there because homeowners insurance, property taxes, mortgage insurance, and HOA dues can materially change the amount associated with the home each month.

So CalculateThisWay should always separate principal plus interest from estimated full monthly housing payment. That one distinction can prevent a lot of confusion.

What About Property Taxes?

Property taxes are costs of owning the property, not interest charged by the lender. The amount varies based on location, assessed value, exemptions, local rules, and changes over time.

If you know the annual dollar amount, enter it. If you're estimating using a percentage of the home value, use that only as a planning assumption. Do not assume today's property-tax bill will remain identical forever. CFPB notes that taxes and insurance can change over time, which can affect the total monthly amount associated with the home even when the principal-and-interest portion on a fixed-rate loan does not change.

Homeowners Insurance Is Another Separate Cost

Homeowners insurance is also not part of the interest rate. It is a separate ownership cost. If the annual premium is $1,800, then $1,800 divided by 12 equals $150 per month. Whether the amount is collected through escrow or paid separately does not make the cost disappear. That is why it belongs in the monthly housing picture.

What Is Escrow?

You may notice that your lender or servicer collects more each month than just principal and interest. An escrow account can be used to collect money toward expenses such as property taxes and homeowners insurance so those bills can be paid when due. CFPB explains that taxes and homeowners insurance may be included in escrow arrangements depending on the loan.

This calculator does not need to decide whether your loan requires escrow. It simply helps you see the costs whether you pay them through the mortgage company or separately.

What About PMI?

PMI stands for private mortgage insurance. It is generally associated with certain conventional mortgages and protects the lender rather than the homeowner. CFPB notes that borrowers may be required to have PMI in some conventional-loan situations with less than 20% down.

But here's what I do not want this calculator doing: looking at 10% down and automatically inventing a PMI bill. Actual cost depends on the loan. Instead, if you already have a PMI estimate, enter it. Then the calculator can add it to the monthly total. If you don't know it yet, leave it blank and recognize that the result does not include it.

PMI and FHA Mortgage Insurance Are Not the Same Thing

This matters. Conventional PMI and FHA mortgage insurance are not interchangeable labels. FHA loans use mortgage insurance premiums under FHA program rules, including upfront mortgage insurance for most FHA single-family insurance programs.

So this page uses the generic input Mortgage Insurance and lets the visitor enter a dollar estimate. It should not pretend to determine the correct insurance program automatically.

What Does the Interest Rate Actually Change?

This is one of those things where half a percent sounds tiny. It isn't always tiny when you multiply it across a large balance for decades.

Go back to our $280,000 mortgage over 30 years. At 6.25%, principal and interest are approximately $1,724 per month. At 6.75%, about $1,816. At 7.25%, about $1,910. The home price didn't change. The down payment didn't change. The loan amount didn't change. Only the interest rate changed.

That's why the What Does a Small Rate Change Do? comparison exists directly on this page above. It isn't predicting tomorrow's mortgage rates. It is showing you the mathematical sensitivity of your loan.

Why a 15-Year Mortgage Looks So Different From a 30-Year Mortgage

Loan term changes the tradeoff between monthly payment and time. Using the same $280,000 loan and the same 6.75% rate purely for comparison: 30 years produces principal and interest of approximately $1,816 per month. 20 years is about $2,129. 15 years is about $2,478.

The shorter term requires a much larger monthly payment. But because the balance is scheduled to disappear sooner, the model produces substantially less total interest. That does not automatically mean everyone should choose the shortest loan. A higher required payment affects cash flow. The purpose of the comparison above is to let you actually see the tradeoff.

Also remember that real lenders may offer different interest rates for different terms. This calculator's term comparison holds the rate constant only so you can isolate what the timeline itself changes.

Why Does So Much of the Early Payment Go to Interest?

This one surprises a lot of people. You make a payment every month, but the principal balance seems like it barely moved. With a standard amortizing mortgage, interest is calculated based on the remaining balance. At the beginning, the balance is at or near its highest point, so the interest portion is also larger.

As principal gets paid down, the balance used to calculate interest gets smaller. Over time, more of the regular payment goes toward principal. CFPB describes this same progression when explaining how mortgage balances are paid down. That's why this calculator shows milestone balances instead of making you guess. If you want the complete payment-by-payment schedule, use the Amortization Calculator.

How Much Interest Can a 30-Year Mortgage Really Cost?

This is why I don't want people looking only at the monthly payment. On our $280,000 example at 6.75% for 30 years, principal and interest total approximately $653,787. You borrowed $280,000. The difference, approximately $373,787, is scheduled interest under those assumptions.

That does not mean the mortgage is automatically "bad." It means borrowing money over 30 years has a cost. Now you can compare that cost against another rate, another term, another loan amount, or another down payment.

What Happens If You Pay Extra Principal?

Let's say the required principal-and-interest payment is $1,816. You decide to add $200 per month toward principal. If the mortgage allows the extra payment and it is applied as modeled, the balance decreases faster. That means there is less principal available to generate future interest. In our example, the difference can be substantial.

But this is exactly where CalculateThisWay needs to stay in its lane. The Mortgage Calculator can show "here's what an extra $200 might do." It should not turn into the Debt Payoff Calculator, and it should not automatically tell somebody to throw every extra dollar at the mortgage. If you have higher-interest debt competing for that money, use the Debt Payoff Calculator. If the issue is emergency savings, use the Emergency Fund Calculator. Different goals deserve different math.

Could There Be a Prepayment Penalty?

Possibly. CFPB defines a prepayment penalty as a fee some lenders charge when a borrower pays off all or part of a mortgage early, although not every mortgage has one. That is why the extra-payment result must say: check your loan terms. The calculator cannot see your mortgage contract.

Why Can a Fixed-Rate Mortgage Payment Still Change?

This is another confusing one. You chose a fixed interest rate. Then the amount coming out every month changes. How? The principal-and-interest portion of a standard fixed-rate mortgage stays based on the fixed rate. But the total monthly amount can still change because property taxes change, homeowners insurance premiums change, mortgage insurance changes or ends, escrow adjustments occur, and other property-related charges change.

CFPB specifically lists changes in taxes, insurance, and escrow-related items among reasons a monthly mortgage payment can change. So a fixed rate does not necessarily mean every dollar of your total housing payment is frozen for 30 years.

Should You Include HOA Fees?

If the property has a mandatory HOA or condo fee, yes, include it when you're trying to understand the monthly housing cost. The HOA fee is not principal. It is not interest. It does not reduce your mortgage balance. It is simply another recurring cost attached to owning that particular property. This is one reason two identical mortgage balances can still produce very different monthly housing costs.

What Isn't Included in This Mortgage Calculator?

This page should clearly tell people what it does not automatically calculate. Unless the user enters them, the result may not include closing costs, maintenance, repairs, utilities, moving expenses, furniture, renovations, special assessments, changing property taxes, changing insurance costs, future HOA increases, or real-estate transaction costs.

Closing costs are especially important because they affect how much money is needed upfront, but they are not part of the regular principal-and-interest mortgage payment. If the upfront cash is the question, use the Down Payment Calculator.

What Is the Loan Estimate?

Once you're actually shopping for a mortgage, the lender's Loan Estimate becomes far more important than a generic online calculator. CFPB's Loan Estimate materials show principal and interest separately from estimated total monthly payment and other loan costs.

Use CalculateThisWay to model scenarios before and during shopping. Then compare those scenarios with the actual lender documents. If the calculator says $2,300 and the Loan Estimate says $2,600, don't ignore the difference. Find out what the additional $300 represents.

A Mortgage Payment That Fits the Calculator May Still Not Fit Your Life

This calculator can correctly tell you, "based on these inputs, the estimated monthly housing payment is $2,500." It cannot tell you whether you personally want a $2,500 housing payment. That's why we are keeping this page completely separate from Home Affordability.

If your question becomes, "okay, but can I actually afford this with my salary and debts?" use the Home Affordability Calculator. Then put the payment into the Budget Calculator. One answers lender-style affordability math. The other shows what happens to the rest of your monthly life.

The Number I Want You to Leave With

Don't leave this page knowing only "my mortgage payment is $1,816." Leave knowing: home price $350,000, down payment $70,000, loan amount $280,000, principal plus interest about $1,816, taxes about $292 per month, insurance $100 per month, estimated monthly housing total about $2,208, loan term 30 years, rate assumption 6.75%, and estimated interest across the scheduled mortgage about $373,787.

And then ask: what happens if the rate changes? What happens if I choose another term? What happens if the down payment changes? How much does this home actually cost me every month? That is what a mortgage calculator should help you understand.

Real Questions People Ask About Mortgages

Sources & Methodology