Payday Loan Calculator

Short-term borrowing costs are determined by combining the principal, interest charges, and administrative fees. The core mathematical model uses several interconnected formulas to establish your complete financial obligation. First, the effective Annual Percentage Rate (APR) is calculated using the formula: apr = ((interest / loan) * 365) / term. Next, the total dollar amount attributed to the APR is found via apr_amount = apr * loan. Monthly maintenance fees or service charges are factored in using monthlyFee = monthlyFeePercent * loan * ceil(term / 30). Finally, your absolute total debt is the sum of the initial principal, total interest, and any cumulative monthly fees: debt = interest + loan + monthlyFee.

Imagine you take out a short-term payday loan of $500 for a term of 14 days, with a fixed interest charge of $75 and a monthly fee percentage of 2% applied across the term windows. First, we calculate the APR: apr = (($75 / $500) * 365) / 14 = (0.15 * 365) / 14 = 3.9107, or roughly 391.07%. Next, we calculate the fee: monthlyFee = 0.02 * $500 * ceil(14/30) = $10 * 1 = $10. Finally, adding these components together gives your total debt obligation: debt = $75 (interest) + $500 (loan) + $10 (monthlyFee) = $585 total repayment amount due at the end of the 14-day term.

Always review the effective APR rather than just the flat fee, as short-term rates compound heavily when annualized. Consider alternative emergency funding sources, such as credit union assistance programs or employer salary advances, which typically feature significantly lower borrowing costs. If you must use a payday loan, budget strictly to ensure full repayment by the due date to avoid catastrophic rollover fees and escalating debt cycles.