Equal principal loan calculator
- Enter loan amount, APR, and term (equal principal mode).
- See first payment (often highest), declining payments, total interest, and schedule.
- Compare with level-payment loans on the loan calculator or loan comparison.
Equal principal explained
Same principal each month; interest on the remaining balance—payments fall over time. Total interest is usually lower than level payment, but early payments are higher.
When it matters
Common label on some mortgage products; useful when modeling prepayment with a declining balance curve. Payment-based borrowing power (level payment): payment calculator.
Frequently asked questions
Equal principal vs amortizing?
Equal principal pays the same principal each month—payment declines as interest drops. Amortizing keeps payment level. This page is equal principal with a schedule.
Vs the main loan calculator?
The loan calculator can switch types—this URL defaults to equal principal for that search intent.
Why is the first payment highest?
Interest is on the full balance in month one—total payment is highest first, then declines.
Extra payments?
Standard equal-principal schedule here—for extras, use the main loan or extra-payment tools.
Can I share this scenario with someone?
Yes. Copy link below the form keeps your current inputs so you can share the scenario or save it for later.
Biweekly?
Monthly equal principal—use other loan tools for biweekly cadence.
Business loans?
Same math structure; real products may add fees or balloons—planning only.