Loan Amortization Calculator

Q: Is this an official IRS calculation?

No. This is an educational estimate.

Q: Does it include every tax rule?

No. Special rules may change your final result.

Q: Which tax year does it use?

It uses the stated 2026 planning assumptions where applicable.

Payment	Principal	Interest	Balance
1	$340	$167	$24,660
2	$343	$164	$24,317
3	$345	$162	$23,972
4	$347	$160	$23,625
5	$349	$158	$23,276
6	$352	$155	$22,924
7	$354	$153	$22,570
8	$356	$150	$22,214
9	$359	$148	$21,855
10	$361	$146	$21,494
11	$364	$143	$21,130
12	$366	$141	$20,764
13	$368	$138	$20,396
14	$371	$136	$20,025
15	$373	$133	$19,651
16	$376	$131	$19,275
17	$378	$129	$18,897
18	$381	$126	$18,516
19	$383	$123	$18,132
20	$386	$121	$17,746
21	$389	$118	$17,358
22	$391	$116	$16,967
23	$394	$113	$16,573
24	$396	$110	$16,176

Payment

Principal

Interest

Balance

$340

$167

$24,660

$343

$164

$24,317

$345

$162

$23,972

$347

$160

$23,625

$349

$158

$23,276

$352

$155

$22,924

$354

$153

$22,570

$356

$150

$22,214

$359

$148

$21,855

$361

$146

$21,494

$364

$143

$21,130

$366

$141

$20,764

$368

$138

$20,396

$371

$136

$20,025

$373

$133

$19,651

$376

$131

$19,275

$378

$129

$18,897

$381

$126

$18,516

$383

$123

$18,132

$386

$121

$17,746

$389

$118

$17,358

$391

$116

$16,967

$394

$113

$16,573

$396

$110

$16,176

Quick Answer

The Loan Amortization Calculator provides an educational estimate using the figures you enter. It is designed for taxpayers who want a fast planning view before preparing a return or meeting with a CPA.

How to Use This Calculator

Enter your filing status and the requested income or expense amounts.
Review the real-time estimate in the result summary.
Use the result as a planning starting point and confirm your final return details.

The Formula & Math

Each payment covers accrued interest first, with the remaining amount reducing principal.

Real-World Example

As a fixed-rate loan amortizes, its interest portion declines and principal portion rises.

FAQ

Is this an official IRS calculation?

No. It is an educational estimate and does not replace tax software, a filed return, or professional advice.

Does it include every tax rule?

No. Special deductions, credits, state rules, and changes in law can affect the final amount.

Which tax year does it use?

This calculator uses the stated 2026 planning assumptions where applicable.

When to Consult a CPA

Your income comes from a business, rental, investment, or multiple states.
You are making a major transaction or planning decision.
Your estimate differs materially from your withholding or prior-year return.