Mortgage Calculator: What Your Monthly Payment Really Includes at Today’s Rates
Type a home price and a rate into most mortgage calculators and you’ll get a number back in half a second. The problem is that number is usually just principal and interest — the two easiest pieces to calculate, and often the smallest part of the story. The payment that actually shows up on your bank statement every month includes at least two more pieces, and sometimes a third, that catch first-time buyers off guard.
Here’s what actually makes up your payment, what it looks like at today’s rates, and how to use the numbers without getting blindsided later.
The Four Letters: PITI
Lenders use the acronym PITI to describe a full mortgage payment:
- Principal — the portion that pays down what you actually borrowed
- Interest — the cost of borrowing the money, calculated on your remaining balance
- Taxes — your local property tax, usually collected monthly and held in escrow
- Insurance — homeowners insurance, also usually escrowed
Most online calculators — including the quick ones you’ll find with a Google search — only show P and I. That’s fine for comparing loan terms, but it’s not what you’ll actually pay, and the gap between the two can be several hundred dollars a month depending on where you live.
Where Rates Stand Right Now
As of mid-August 2026, Freddie Mac’s weekly survey puts the average 30-year fixed rate at 6.67%, and the 15-year fixed at 5.96%. Rates have been sitting in the 6.5–6.8% range for most of the year, well above the sub-4% rates from a few years ago, and most forecasters — including the Mortgage Bankers Association and Fannie Mae — expect them to stay in the 6–6.5% range through the rest of 2026 rather than drop sharply.
What that means practically: the median monthly mortgage payment nationally was around $2,191 as of mid-2026, according to MBA data. If your own numbers come out meaningfully higher than that, it’s not necessarily a red flag — it depends heavily on your home price and location — but it’s worth knowing where the national middle sits.
A Worked Example
Say you’re looking at a $380,000 home with 10% down ($38,000), leaving a loan amount of $342,000 on a 30-year fixed loan at today’s average rate of 6.67%.
| Component | Monthly cost |
|---|---|
| Principal & interest | $2,201 |
| Property tax (est. 1.1%/yr) | $348 |
| Homeowners insurance (est.) | $135 |
| PMI (since down payment is under 20%) | $171 |
| Total monthly payment | $2,855 |
Notice that principal and interest — the number most calculators show — is $2,201, but the real payment is $2,855. That’s a $654 gap, almost entirely from taxes, insurance, and PMI. This is exactly the kind of surprise that catches people who only budgeted around a bare P&I quote from a lender’s advertised rate.
The One Line Item People Forget: PMI
If your down payment is below 20% of the home’s price, most conventional lenders require Private Mortgage Insurance (PMI) — it protects the lender, not you, in case you default. It typically runs somewhere between 0.3% and 1.5% of the loan amount per year, depending on your credit score and down payment size.
The good news: PMI isn’t permanent. Once you’ve paid your loan balance down to 78–80% of the home’s original value — either through regular payments or because the home has appreciated — you can request to have it removed. On the example above, that’s usually somewhere between 5 and 9 years in, depending on extra payments and market conditions.
15-Year vs. 30-Year: The Real Trade-Off
At today’s rates, the gap between a 15-year and 30-year loan is unusually wide — 6.67% vs. 5.96%, roughly 70 basis points. That gap matters more than it sounds:
| Term | Monthly P&I | Total interest paid |
|---|---|---|
| 30-year @ 6.67% | $2,201 | $449,600 |
| 15-year @ 5.96% | $2,879 | $176,200 |
The 15-year option costs $678 more per month but saves roughly $273,000 in interest over the life of the loan. Whether that trade makes sense depends entirely on your monthly budget — if the higher payment is a stretch, a 30-year loan with extra principal payments when you can afford them often gives you a middle path.
Should You Wait for Rates to Drop?
This is the question everyone’s asking right now, and there’s no universal answer, but a few things are worth knowing:
- Rates have hovered in a fairly narrow 6–7% band for the better part of two years — waiting for a dramatic drop has, so far, meant waiting through a lot of stable-but-elevated months.
- If rates do fall meaningfully later, refinancing is generally possible, though it comes with its own closing costs — the common rule of thumb is that refinancing makes sense if you can drop your rate by at least a full percentage point.
- Home prices historically don’t wait for rates to move — buying when you’re financially ready usually beats trying to time a rate bottom.
Frequently Asked Questions
Why did my lender’s quoted rate not match what I see online?
Advertised national averages assume excellent credit and a standard down payment. Your actual rate depends on your credit score, loan type, down payment, and the specific lender — it’s normal to see a difference of half a point or more from the average.
Does a bigger down payment always lower my rate?
Not directly, but it lowers your loan-to-value ratio, which can help you qualify for better rate tiers and — importantly — get you past the 20% threshold where PMI drops off.
Is an adjustable-rate mortgage (ARM) worth considering right now?
ARMs are currently priced close to 30-year fixed rates, which removes much of their usual appeal. They can still make sense if you’re confident you’ll sell or refinance within the ARM’s fixed period, but the rate discount that used to make them attractive is smaller than it’s historically been.
Should I include HOA fees in my calculation?
Yes, if the property has them. HOA fees aren’t part of PITI and won’t show up in most mortgage calculators, but they’re a real, recurring cost — add them separately to whatever the calculator gives you.
Run your own numbers — home price, down payment, rate, and term — through the Mortgage Calculator to see your estimated principal, interest, and total payment instantly.
This article is for general informational purposes and isn’t personalized financial advice. Mortgage rates and loan terms vary by lender, credit profile, and location — always get a written estimate from your lender before making a decision.