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The full schedule separates principal and interest. Commission increases the balance only when financing is selected; the model uses a fixed nominal monthly rate.

| Offer | Rate | Years | Commission | Payment | Total cost |
|---|---|---|---|---|---|
| A | — | — | |||
| B | — | — |
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monthly rate i = annual rate ÷ 12 ÷ 100equal instalment = P × i ÷ (1 − (1 + i)^−n)decreasing instalment (first) = P ÷ n + P × iWorked example
Worked example using the form's default values.
The full schedule separates principal and interest. Commission increases the balance only when financing is selected; the model uses a fixed nominal monthly rate.
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The full schedule separates principal and interest. Commission increases the balance only when financing is selected; the model uses a fixed nominal monthly rate.