What makes the desktop version different?
The free Daily Interest & Per Diem Calculator is ideal for a quick calculation. Daily Interest & Payoff Calculator Pro is designed for people who perform the calculation repeatedly and need to keep a record of the result.
- Save and reopen borrower or customer payoff calculations.
- Store a borrower/customer name, loan number, and notes.
- Calculate daily interest / per diem, accrued interest, and total payoff.
- Choose Actual/365, Actual/360, or Actual/366.
- Include or exclude the start and payoff-through dates.
- Add an optional payoff adjustment or credit.
- Preview and print a professional one-page payoff worksheet.
- Save the payoff worksheet directly as a PDF.
Free browser statement vs. Windows Pro
The browser tool is intentionally convenient for a one-off statement. The paid Windows program is the better fit when payoff work repeats and the calculation needs to remain a reusable working file.
| Workflow | Free browser tool | Windows Pro |
|---|---|---|
| Daily interest / per diem | Yes | Yes |
| Borrower and loan details | Yes | Yes |
| Print / Save PDF | Yes | Yes |
| Save for later | On this browser/device | Reusable Windows calculation file |
| Reopen for repeated payoff work | Local browser only | Yes |
| Best use | One-off statement | Recurring professional payoff work |
Quick details
| Product | Daily Interest & Payoff Calculator Pro |
|---|---|
| Platform | Windows desktop |
| Price | |
| Evaluation | Five uses before registration is required |
| Day-count methods | Actual/365, Actual/360, Actual/366 |
| Reports | Print Preview, Print, and Save As PDF |
| Registration | Six-digit User ID and one-time passcode |
The calculation stays simple
The program uses the same straightforward daily simple-interest calculation as the free web calculator. The desktop product adds workflow features around the calculation rather than turning it into a complicated loan-management system.
Accrued interest is the daily-interest amount multiplied by the selected number of interest days. Total payoff is principal plus accrued interest plus any optional payoff adjustment.
Typical workflow
Evaluation, purchase, and registration
After purchasing through PayPal, PayPal returns you to the Power of Interest registration page. Open Register Software in Daily Interest & Payoff Calculator Pro and enter the Installation ID or User ID requested on the page. The registration page verifies the purchase and provides the one-time passcode automatically. No email or manual response is required, so you can register any time, day or night.
Instant online registration after PayPal purchase — no waiting for email. One-time purchase · No subscription · Secure payment through PayPal · Free evaluation available · Refund policy · License terms
Need more than a payoff calculation?
If you need to rebuild a loan from actual historical transactions, use Loan Reconciliation & Payoff Pro. If you need a complete editable amortization schedule, use Amortization Pro.