Payday Loan Calculator - Estimate Fees & APR

Use this payday loan calculator to estimate total fees, APR, and initial repayment. Model loan rollovers to simulate compound interest and rollover debt.

Updated: May 19, 2026 • Free Tool

Payday Loan Settings

$

Min $50 - Max $5,000

Min 1 day - Max 365 days

$

Commonly $15 per $100

Model cumulative borrowing costs

Calculation Results

Initial Repayment Amount
$345.00
Finance Charge (Fee) $45.00
Annual Percentage Rate (APR) 391.07%
Effective Annual Rate (EAR) 3585.69%
Total Fees Paid (with Rollovers) $45.00
Total Paid Overall (with Rollovers) $345.00

What is a Payday Loan Calculator?

A payday loan calculator is a helpful financial tool designed to estimate the true cost of short-term borrowing before you sign any agreements. Payday loans are small, high-cost cash advances designed for urgent circumstances, but they feature extremely high fees that translate into staggering annual rates.

This tool is typically used in the following scenarios:

  • Estimating the total fees and repayment amount on a small emergency cash advance.
  • Comparing standard short-term loan rates against traditional credit cards or personal loans.
  • Visualizing the impact of high-interest rates on your personal budget before committing.
  • Evaluating the financial risk of rolling over an unpaid balance into a new loan cycle.

To plan your standard amortization schedule, explore our Personal Loan EMI Calculator to calculate steady monthly installments.

How Does a Payday Loan Work?

To calculate the payday loan APR, divide the finance charge (fees) by the principal loan amount, multiply by 365 (number of days in a year), divide by the loan term in days, and multiply by 100 to convert it into a percentage. Understanding this simple equation empowers you to comprehend exactly how lenders translate small fees into annual fees.

Finance Charge = Principal × (Fee Rate / 100)
APR = (Finance Charge / Principal) × (365 / Term in Days) × 100

According to Consumer Financial Protection Bureau, a payday loan is a short-term, high-cost loan, typically for $500 or less, that is usually due on your next payday.

To calculate basic interest schedules without rollovers, explore our Loan Interest Calculator to model straightforward interest accruals.

Key Payday Lending Concepts

Before securing short-term credit, make sure you understand these critical financial concepts:

Principal Amount

The actual amount of cash you receive from the lender at the start of the loan.

Finance Charge / Fees

The fee charged by the lender, commonly calculated as a flat dollar rate per $100 borrowed (e.g. $15 per $100).

Annual Percentage Rate

The annualized cost of credit, which scales the short-term fee to a full 365-day year for standard comparison.

Effective Annual Rate

The actual annual rate including compounding, reflecting what happens if you repeatedly roll over the loan.

To see how compound rates exponentially escalate, explore our Compound Interest Calculator to analyze long-term compounding effects.

How to Use the Calculator

Calculate your estimated borrowing costs and rollover scenarios in seconds with these simple steps:

1

Enter Principal

Enter the principal loan amount you plan to borrow.

2

Enter Loan Term

Enter the loan term, which is the number of days until your next payday.

3

Specify Fee Rate

Specify the flat fee charged per $100 borrowed (typically fifteen dollars).

4

Model Rollovers

Use the rollover simulator to model the compounding cost if you need to extend the loan.

To calculate generic interest rates for basic scenarios, explore our Interest Rate Calculator to quickly determine annual rates.

Benefits of Using This Calculator

Using our calculator before borrowing gives you important strategic advantages:

  • Instant Clarity: Gain instant clarity on the full finance fees before visiting a storefront or online lender.
  • Clear Comparison: Empower yourself with exact APR and EAR percentages to compare payday loans with credit card advances.
  • Risk Awareness: Identify the high risk of a debt spiral by visualizing how fees compound over multiple rollovers.
  • Find Alternatives: Explore cheaper alternative options before taking on high-interest debt that could harm your credit.

To model credit card payoffs and compare plans, explore our Loan Payment Calculator to evaluate structured monthly debt payoff plans.

Factors and Regulations by State

Several crucial factors affect the final terms and feasibility of short-term loans:

State Lending Regulations

Many states set hard limits on the maximum loan amount (e.g. $300 in California) and cap the maximum allowable fee per $100.

Loan Term Duration

Because payday loan APR is calculated using the loan term in the denominator, shorter terms result in higher calculated APRs for the same fee.

Rollover and Extension Fees

If a borrower cannot repay on time, rollovers add a new round of fees onto the existing principal, causing the debt to grow exponentially.

According to Consumer Financial Protection Bureau, a typical two-week payday loan with a fifteen dollar fee per one hundred dollars borrowed equates to an annual percentage rate of almost four hundred percent.

To calculate your remaining balance and payoff curves, explore our Loan Balance Calculator to determine loan amortization over time.

Payday Loan Calculator - Estimate true short-term credit cost, fees, APR, and compound rollover debt
The featured image displays the visual representation of our Payday Loan Calculator tool, highlighting simple budgeting calculations.

Frequently Asked Questions (FAQ)

Q: How is APR calculated on a payday loan?

A: Payday loan APR is calculated by dividing the total finance fee by the loan amount, multiplying by 365 days, dividing by the term of the loan in days, and multiplying by 100 to get the final percentage rate.

Q: Why are payday loan interest rates so high?

A: Payday loan rates are high because they are short-term, unsecured loans designed for quick convenience. The standard $15 fee per $100 borrowed sounds small, but annualized over 14 days, it equates to a 391% APR.

Q: What is the maximum fee for a payday loan?

A: The maximum fee depends entirely on state laws. Some states cap fees at $15 per $100 borrowed, while other states completely ban payday lending or enforce strict caps to protect borrowers from excessive rates.

Q: What happens if you can't pay back a payday loan?

A: If you cannot repay, the loan may roll over or renew, adding more fees to your debt. Eventually, unpaid payday loans are sent to collection agencies, which can severely damage your personal credit score.

Q: Are there alternatives to payday loans?

A: Yes, common alternatives include payday alternative loans (PALs) from credit unions, low-interest personal loans, credit card cash advances, or emergency assistance programs which have much lower fees and longer repayment terms.

Q: Do payday loans affect your credit score?

A: Payday lenders rarely report standard payments to credit bureaus, meaning on-time repayment will not help build your credit. However, defaulting on a payday loan can result in collections, which will harm your credit.