Practical guide
How to calculate cash-loan payments and costs in Poland
A low monthly payment can reflect a long term, while financing a fee can hide additional principal. This guide separates the amount received from debt, counts entered fees once and explains the full schedule. The result is a comparison model, not an assessment of a credit offer.
Amount received versus financed principal
Enter the loan excluding its upfront fee in the amount field. Enter the fee separately and choose whether it is paid initially or added to principal. For a PLN 12,000 loan and PLN 1,200 financed fee, interest starts on PLN 13,200. Do not add the same fee again to the first amount field.
With a separately paid fee, the schedule repays only loan principal and the fee sits outside monthly instalments. Total repayment including entered costs nevertheless includes that fee once. Compare amount received, financed principal, first payment and total repayment: each describes a different part of the borrowing cost.
Nominal interest is not APR/RRSO
The formula needs the full annual nominal rate, not APR/RRSO. The monthly rate is that annual percentage divided by 1,200. APR/RRSO uses defined costs and payment timing; neither nominal interest nor a simple fee total substitutes for it. This calculator does not compute APR/RRSO.
Read the lender’s documents and enter known fees. Zero monthly fees only means that cost was not added to the model. It does not establish absence of insurance, additional services or product conditions. The calculator does not check statutory cost caps or the offer’s legal compliance.
Equal and decreasing payments: a positive-rate example
For PLN 12,000 at a nominal 12% over 12 months with no fees, the first equal payment is PLN 1,066.19, the last PLN 1,066.14 and total interest PLN 794.23. Month one contains PLN 120 interest and PLN 946.19 principal. The final payment resolves cent-rounding differences.
With decreasing payments for the same inputs, principal repayment is PLN 1,000 monthly, the first payment PLN 1,120.00, the last PLN 1,010.00 and interest PLN 780.00. The comparison keeps amount, rate and term identical. These are illustrative calculations, not current market terms or a recommendation of payment type.
Do not count the upfront fee twice
Assume PLN 12,000, 0%, 12 months, a PLN 1,200 fee and PLN 10 recurring monthly fee. A cash-paid upfront fee gives PLN 1,010.00 monthly payments; financing it gives PLN 1,110.00. At 0%, both variants cost PLN 1,320.00 and total repayment including fees is PLN 13,320.00.
The cash-paid-fee schedule totals PLN 12,120, with PLN 1,200 paid initially in addition. In the financed variant the full amount sits inside the schedule. At a positive rate, the financed variant also charges interest on the fee; equal costs in this zero-interest example no longer apply.
| Fee treatment | Monthly payment (PLN) | Total repayment (PLN) |
|---|---|---|
| Cash-paid | 1,010.00 | 13,320.00 |
| Financed | 1,110.00 | 13,320.00 |
Read the schedule and final balance
Each row shows payment including fee, principal, interest, monthly fee and balance after payment. Interest is charged on the current balance, not repeatedly on the unchanged original amount. Check that repaid principal matches financed debt and the ending balance is zero. Copying the result includes the full schedule.
The model assumes monthly periods and one rate. A lender’s calendar, daily interest, shifted dates or other rules can change amounts. The 120-month and six-decimal-rate limits are tool constraints, not statutory limits on offers. For very small amounts, pay particular attention to the final payment.
Source: Annuity-payment model — project methodology; UOKiK — mortgage payments, interest rates and simulation limitations.
Compare inputs without a misleading shortcut
First compare scenarios for the same amount and term, using full rates and known costs. A longer term generally lowers the current payment in this model but can increase total interest. Do not select an offer only because the headline monthly figure is lowest; read total costs and contractual conditions.
Early repayment, fee refunds and repricing require separate calculations not predicted by this schedule. Keep the assumptions and discuss discrepancies with the lender. Data remain local, without analytics or persistent storage. Copying or printing is your deliberate decision.
Frequently asked questions
Can I enter APR/RRSO as the interest rate?
No. The formula uses annual nominal interest. APR/RRSO includes defined costs and timing; entering it in this field will not reproduce the offer.
Does a financed fee increase interest?
Yes at a positive rate: the fee increases principal on which interest is calculated. It is not added again as a second upfront-fee cost.
Does a lower payment always mean a cheaper loan?
No. A longer term can reduce payments while increasing total interest. Compare amount, term, costs and lender documents, not only the first payment.
Does this schedule include early repayment?
No. The fixed-term model does not predict overpayments or cost refunds. Check the contract and obtain the lender’s settlement for the actual repayment date.
Official sources and scope
This is a monthly mathematical model in PLN, not a bank offer, APR/RRSO or a creditworthiness decision. You enter rates and costs; no current offers or reference rates are fetched. Daily interest, staged draws, grace periods, balloon payments and early repayment are outside scope. Check the contractual schedule and required offer information with the lender.
Calculators covered by this guide
Mortgage repayment calculator
Mortgage payments, down payment, fees, full repayment schedule and rate scenario.
Loan repayment calculator
Cash-loan payments, interest and entered fee costs with a full repayment schedule.