Best Free Mortgage Calculators USA 2026 -- Tested & Compared

Most Americans searching for a mortgage calculator get a result that only shows principal and interest. That number is almost always $300-$800 lower than your real monthly payment -- because it's missing taxes, insurance, and PMI.

We tested the most-used free mortgage calculators to find which ones give you the complete picture.

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What Makes a Good Mortgage Calculator?

A quality mortgage calculator for 2026 must show all four components of your payment -- called PITI:

Principal -- The portion that repays your loan balance
Interest -- The lender's fee (front-loaded in the early years)
Taxes -- Property taxes collected monthly into escrow (0.5%-2.5% of home value annually depending on state)
Insurance -- Homeowner's insurance (~$1,400/year nationally) + PMI if down payment was under 20%

| State | Average Property Tax Rate | Annual Tax on $400k Home |

|-------|--------------------------|--------------------------|

| Texas | 1.80% | $7,200/year ($600/mo) |

| California | 0.76% | $3,040/year ($253/mo) |

| Illinois | 2.27% | $9,080/year ($757/mo) |

| Florida | 0.89% | $3,560/year ($297/mo) |

| New York | 1.40% | $5,600/year ($467/mo) |

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The Mortgage Payment Formula (CFPB Standard)

~~~

M = P x [r(1+r)^n] / [(1+r)^n - 1]

~~~

Where: P = loan principal, r = monthly interest rate (annual / 12), n = total payments (years x 12)

Example: $400,000 loan at 7.00% for 30 years:

r = 0.07 / 12 = 0.005833
n = 360
M = $2,661/month (principal & interest only)

Add estimated taxes ($500/mo), insurance ($120/mo), PMI ($150/mo) = $3,431/month total

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2026 Mortgage Rate Comparison Table

|-------------|------|---------------------|---------------------|----------------------|

| $300,000 | 6.75% | $1,946 | $2,661 | $400,560 |

| $400,000 | 7.00% | $2,661 | $3,593 | $558,036 |

| $500,000 | 7.25% | $3,412 | $4,556 | $728,320 |

| $750,000 | 7.25% | $5,118 | $6,834 | $1,092,480 |

*P&I only. Add your taxes, insurance, and PMI for true monthly cost.*

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Is It Better to Get a 15-Year or 30-Year Mortgage?

This is the most common mortgage question. Here's the real math:

On a $400,000 loan at 7%:

30-year: $2,661/month . Total paid: $957,960 . Interest: $557,960
15-year: $3,593/month . Total paid: $646,740 . Interest: $246,740

The 15-year costs $932/month more but saves $311,220 in interest.

Choose 15-year if you can afford the higher payment and want to be debt-free faster.

Choose 30-year if you want lower payments and plan to invest the difference (S&P 500 historically returns ~10% vs the 7% you'd save by paying down the mortgage faster).

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PMI: What It Is and When You Can Remove It

PMI (Private Mortgage Insurance) is required when your down payment is less than 20%. It protects the lender -- not you -- and typically costs 0.5%-1.5% of the loan annually.

On a $400,000 loan: $2,000-$6,000/year ($167-$500/month).

How to remove PMI:

1. Request removal when your loan reaches 80% LTV (20% equity)

2. By law (Homeowners Protection Act), lenders must auto-cancel at 78% LTV

3. Refinancing when your home has appreciated to 80% LTV

Use our [mortgage calculator](/calculators/finance/home-loan-calculator) to model exactly when you'll hit 80% LTV.

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Frequently Asked Questions

What credit score do I need for a mortgage in 2026?

Conventional loans: minimum 620. FHA loans: 580 (3.5% down) or 500 (10% down). For the best rates (0.5%-1% lower), aim for 740+.

How much down payment do I need?

Conventional: 3-5%. FHA: 3.5%. VA/USDA: 0%. However, 20% eliminates PMI and saves $150-$500/month.

Should I pay off my mortgage early or invest?

If your rate is above 7%, paying off is a guaranteed 7%+ return. If below 5%, investing in index funds likely wins long-term. Our [pay off vs invest calculator](/calculators/finance/pay-off-mortgage-vs-invest-calculator) models your exact scenario.

Try our [free mortgage calculator](/calculators/finance/home-loan-calculator) -- includes full PITI, amortization schedule, and 15 vs 30-year comparison. No signup required.