Weekly Payment Sheet: Calculate Loan Payments

A weekly payment sheet is a schedule that shows how much a borrower pays each week and how those payments reduce a loan balance over time. This calculator estimates the equivalent weekly payment for a fixed-rate loan from the amount borrowed, annual percentage rate (APR), and term, then estimates total interest using that rounded payment.

Formula

The calculator treats a year as 52 weekly payment periods and converts the stated annual percentage rate into a periodic rate by dividing by 5,200. The level-payment formula is:

Weekly payment = P × r ÷ [1 − (1 + r)⁻ⁿ]

• P is the starting loan principal in dollars.
• r is the weekly interest rate as a decimal, calculated as APR ÷ 5,200.
• n is the number of weekly payments, calculated as loan term in years × 52.

The formula calculates the payment that would amortize a fixed-rate balance over the selected number of equal weekly periods, assuming interest accrues at the stated periodic rate. The displayed payment is rounded to the nearest cent. Estimated total interest is the rounded weekly payment multiplied by the number of weeks, minus the original principal. Because the payment is rounded, the estimate may differ slightly from a lender’s final schedule or payoff amount.

Worked Example

Using the calculator’s default values—$20,000 borrowed, an 8% APR, and a five-year term:

1. Weekly rate: 8 ÷ 5,200 = 0.00153846, or about 0.153846% per week.
2. Number of payments: 5 × 52 = 260.
3. Substitute into the payment formula: $20,000 × 0.00153846 ÷ [1 − (1.00153846)⁻²⁶⁰].
4. Weekly payment, rounded to cents: $94.64.
5. Estimated total interest using the rounded payment: $94.64 × 260 − $20,000 = $4,606.40.

These are formula-based estimates. A lender may calculate interest using actual calendar days, different payment dates, or contractual rounding rules, which can change the schedule.

Assumptions

• The interest rate stays fixed for the entire term.
• Payments are equal and made once per week; the model treats each payment period as one fifty-second of a year.
• Interest is modelled weekly at APR ÷ 52, equivalent here to converting the annual percentage figure using APR ÷ 5,200.
• Fees, taxes, insurance, escrow, late charges, and other loan costs are not included.

What a Weekly Payment Sheet Shows

A full payment sheet, also called an amortization schedule, generally lists each due date or payment number, the amount due, the interest portion, the principal portion, and the remaining balance. Early in a typical amortizing loan, more of each payment goes toward interest because interest is calculated on a larger outstanding balance. As the balance declines, the interest portion usually falls and more of each fixed payment reduces principal.

The calculator above provides the payment and estimated total interest, not a row-by-row schedule. A lender’s sheet may also show opening and closing balances, fees, payment dates, or a final payment adjusted for rounding. The lender’s own documents are the reference for the contractual amount due and the exact balance.

How to Use the Estimate

Enter the amount financed rather than the purchase price if the loan covers only part of a purchase. Enter the APR and term stated in the relevant loan disclosure or quotation; do not substitute a rate found elsewhere. For instance, for a $12,000 balance with a four-year term, the calculation needs the annual rate applicable to that specific borrowing. Changing the rate or term changes both the calculated weekly payment and total interest.

• Use the full term in years, not the number of weekly payments.
• Check whether the quoted payment frequency is actually weekly. A fortnightly or biweekly payment schedule is not the same as weekly.
• Compare estimates only when the principal, APR, term, and included charges are treated consistently.
• For a real payment sheet, check the payment due date, whether the first period is longer or shorter, and whether any fees are added to the balance.

Weekly Payments Compared with Monthly Payments

A weekly payment is not simply the monthly payment divided by four. There are 52 weeks in a year but 12 months, so a year has an average of about 4.33 weeks per month. Dividing a monthly amount by four and paying that amount every week would result in 13 four-week payments over a 52-week year, not 12 monthly payments. That difference can affect the amount paid over a year and the repayment timeline.

Payment frequency can also change how a lender applies interest. Some contracts calculate interest daily, while others use a periodic method or define payment dates in a particular way. This calculator uses a simplified weekly rate and equal weekly periods. A monthly payment quote cannot be converted precisely to a weekly contractual amount without knowing the lender’s calculation method and terms.

Common Problems and Limits

The main source of confusion is the meaning of “weekly.” It can refer to a payment due every seven days, a weekly budget allocation toward a monthly bill, or a lender’s schedule that uses a specific calendar. Those are not automatically interchangeable. A payment sheet can also differ from a calculator if the first payment date creates an irregular period, the APR includes costs treated differently in the contract, or the loan has a variable rate.

Rounding matters over many payments. This estimate rounds the weekly payment to cents before multiplying by the number of weeks. A servicing system may carry more precision internally, adjust the final instalment, or calculate interest from the actual number of days between payments. The result also does not model missed payments, extra principal payments, payment holidays, or refinancing. Obtain the actual schedule and the relevant rate and fees from the lender; the calculator cannot determine contractual terms.

Frequently Asked Questions

What is a weekly payment sheet?
A weekly payment sheet is a breakdown of scheduled weekly payments and, usually, the interest, principal, and remaining balance associated with each payment.

How do I calculate a weekly loan payment?
Convert the annual rate to a weekly periodic rate, multiply the loan term in years by 52 to get the payment count, and use the fixed-payment formula shown above. The estimate assumes a fixed rate and equal weekly periods.

Is a weekly payment one-quarter of a monthly payment?
No. Four weekly payments cover 28 days, while a month is generally longer. A year contains 52 weeks, so dividing a monthly amount by four and paying weekly does not preserve the same annual total.

Does paying weekly reduce total interest?
It depends on how the contract applies payments and interest. This calculator estimates a loan designed for weekly instalments; it does not establish the savings from changing an existing monthly schedule. Check the contract or ask the lender how payment timing affects the balance.

Why does my lender’s payment differ from this result?
The lender may use actual dates, daily interest, different compounding or rounding conventions, fees, or an irregular first payment period. The displayed estimate excludes those contract-specific details.

This result is an estimate for educational purposes, and the lender’s disclosure gives the exact figures.

Related

• EDD Payments: Weekly or Biweekly?
• EI Payments Weekly or Biweekly? Schedule Explained
• Weekly Loan Payment Calculator and Formula

in p | Loan amount | $ | 20000 | 1 | 100000000
in apr | Interest rate (APR) | % | 8 | 0.01 | 100
in yrs | Loan term | years | 5 | 0.0833 | 50
out pmt | Weekly payment | $ | p * (apr / 5200) / (1 - (1 + apr / 5200) ^ -(yrs * 52)) | 2
out int | Estimated total interest | $ | pmt * yrs * 52 - p | 2