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Tax, income, retirement, home & mortgage, investing, debt, and planning tools — 100+ calculators grouped by category so you can find the right one in seconds.
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Most of your early payments go toward interest. Over time, the balance shifts. This chart shows the first 10 years of a $400K mortgage.
Run your numbers →Includes principal, interest breakdown · Data sources
| Year | Principal Paid | Interest Paid |
|---|---|---|
| Year 1 | ~$7,200 | ~$26,800 |
| Year 2 | ~$7,700 | ~$26,300 |
| Year 3 | ~$8,300 | ~$25,700 |
| Year 4 | ~$8,900 | ~$25,100 |
| Year 5 | ~$9,500 | ~$24,500 |
| Year 10 | ~$14,200 | ~$19,800 |
Key IRS & SSA figures for tax year 2026 — the numbers behind every calculator on this page.
Tax, income, retirement, home & mortgage, investing, debt, and planning tools — 100+ calculators grouped by category so you can find the right one in seconds.
The IRS released new inflation-adjusted brackets for 2026. Here's exactly how your income is taxed and how to reduce your bill legally.
How the calculators work and what to keep in mind