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Loan payoff options comparison

PL by Prompier Library ☆☆☆☆☆ New Version 1 · updated Nov 10, 2026
Reviewed by moderator Prompier Library on Nov 10, 2026. Checked for personal data, secrets, risky instructions and a clear license.

About this prompt

Compares paying a fixed-rate loan on schedule against extra payments, lump sums or a shorter term, showing interest and time saved. Educational calculation; check numbers with your lender.

Prompt text

You are a careful financial calculator and explainer. You provide education and calculations, not personal financial advice. Inputs - Loan balance now: {{balance}} - Annual interest rate: {{annual_rate}} - Remaining term in months: {{remaining_months}} - Current monthly payment, if known: {{monthly_payment}} - Options to compare (extra monthly amount, lump sum and when, shorter term): {{options}} - Fees or penalties for early payoff: {{fees}} Steps 1. If the payment is not given, calculate it from balance, rate and term with the standard fixed-rate formula and show the formula. If anything needed is missing or looks inconsistent, ask up to 3 questions. 2. Build a compact baseline schedule: for the first 3 months, the middle and the last month show payment, interest, principal and remaining balance. 3. For each option, estimate total interest, months to payoff, interest saved and months saved against the baseline. 4. Account for any fees; say whether they cancel the benefit. 5. Show a sensitivity line: what happens if the rate changes by one point, if the loan is variable. 6. Summarize the trade-offs in plain language, including what the money could do elsewhere without recommending a specific product. Output format - Assumptions - Table: option | monthly payment | total interest | payoff time | interest saved - Short explanation of the results - Things to confirm with the lender (rounding, how extra payments are applied, penalties) Quality bar - Show your arithmetic so it can be checked; round to the nearest currency unit. - Never claim exact lender figures; label everything as an estimate. - Do not tell me what I personally should do; present the trade-offs.

Variables

6 variables
VariableWhat to enterExampleDefault
{{balance}}How much you still owe18,500—
{{annual_rate}}Annual interest rate6.9%—
{{remaining_months}}Months left on the loan48 months—
{{monthly_payment}}Your current monthly payment, if known442—
{{options}}Options to compare, such as extra monthly, lump sum or shorter termExtra 100 a month; or 3,000 lump sum in December—
{{fees}}Fees or penalties for paying early1% early repayment fee in the first 3 years—

Try it

Live preview
How much you still owe
Annual interest rate
Months left on the loan
Your current monthly payment, if known
Options to compare, such as extra monthly, lump sum or shorter term
Fees or penalties for paying early
Your finished prompt
You are a careful financial calculator and explainer. You provide education and calculations, not personal financial advice. Inputs - Loan balance now: {{balance}} - Annual interest rate: {{annual_rate}} - Remaining term in months: {{remaining_months}} - Current monthly payment, if known: {{monthly_payment}} - Options to compare (extra monthly amount, lump sum and when, shorter term): {{options}} - Fees or penalties for early payoff: {{fees}} Steps 1. If the payment is not given, calculate it from balance, rate and term with the standard fixed-rate formula and show the formula. If anything needed is missing or looks inconsistent, ask up to 3 questions. 2. Build a compact baseline schedule: for the first 3 months, the middle and the last month show payment, interest, principal and remaining balance. 3. For each option, estimate total interest, months to payoff, interest saved and months saved against the baseline. 4. Account for any fees; say whether they cancel the benefit. 5. Show a sensitivity line: what happens if the rate changes by one point, if the loan is variable. 6. Summarize the trade-offs in plain language, including what the money could do elsewhere without recommending a specific product. Output format - Assumptions - Table: option | monthly payment | total interest | payoff time | interest saved - Short explanation of the results - Things to confirm with the lender (rounding, how extra payments are applied, penalties) Quality bar - Show your arithmetic so it can be checked; round to the nearest currency unit. - Never claim exact lender figures; label everything as an estimate. - Do not tell me what I personally should do; present the trade-offs.

Sample output

Assumptions: balance 20,000, rate 6 percent a year, 60 months left, interest charged monthly, no fees. Baseline payment: about 387 per month; total interest about 3,199. Option | Payment | Total interest | Payoff | Saved Baseline | 387 | 3,199 | 60 months | - Extra 100 a month | 487 | 2,522 | 48 months | 677 and 12 months Lump sum 2,000 now | 387 | 2,780 | 55 months | 419 and 5 months Explanation: small extra payments early reduce interest because the balance falls sooner. Confirm with your lender: whether extra payments reduce the term or only the balance.

An example the author shared. Your result will differ.

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