Payday Loan APR Calculator: Why $15 Per $100 Is Really a 391% Annual Rate

1. What Is a Payday Loan?

The CFPB defines a payday loan as a short-term, high-cost loan generally for $500 or less that is typically due on your next payday. The lender takes a post-dated check or electronic access to your bank account as collateral. No credit check is required. The loan is approved in minutes, and the fee is collected automatically when the due date arrives.

That convenience is the product. The fee is the price. And as this guide will show, the price as measured by any standard annualized method is extraordinarily high compared to almost every alternative form of credit available to American consumers.

The Center for Responsible Lending reports that payday loans carry nearly 400% APR on average, and that lenders take $2.4 billion in fees from borrowers annually. Your site’s own About Us page uses the specific example that a 391% APR payday loan fee is equivalent to $1,564 in annual interest on a $400 loan — the exact information that should change every borrower’s decision.

2. How Payday Loan APR Is Actually Calculated

The CFPB uses a specific methodology for converting payday loan fees into APR, and our calculator follows that same standard.The formula is straightforward once you see it laid out:

At a $20 per $100 fee on the same 14-day term, the calculation produces a 521% APR. Some lenders charge higher fees in states with no cap, pushing annualized rates above 600%.

3. The Rollover Debt Trap: How $350 Becomes a Crisis

The fee itself is only the first layer of risk. The deeper danger is the rollover. When the two-week due date arrives and you cannot repay in full — which CFPB data shows is common — the lender offers to extend the loan another two weeks in exchange for another full fee. The principal does not reduce. You simply pay to restart the clock.

The CFPB has estimated that a borrower incurs $360 in rollover fees over four months, compared to a one-time $45 fee if they had enrolled in an Extended Payment Plan instead — where one existed. That is an eight-fold difference in cost from a single initial decision.

4. State Laws: What Your State Allows — and What It Bans

Payday loan regulation is one of the most patchwork consumer-finance legal environments in the US. Sixteen states and the District of Columbia have banned payday loans outright due to their predatory nature. Among the 26 states that still permit them, 16 require lenders to offer free Extended Payment Plans — but CFPB research shows that borrowers continue to roll over loans at high rates even in those states.

5. The Extended Payment Plan: Your Most Underused Right

If you are already in a payday loan and facing a rollover, an Extended Payment Plan (EPP) is often your most powerful tool — and it is free in the 16 states that mandate it. An EPP converts your single balloon payment into installments, immediately stopping the rollover fee clock.

The CFPB’s own data makes the comparison stark: EPP typically costs a one-time $45 fee versus an estimated $360 in cumulative rollover fees over four months. Many borrowers do not know this option exists — or their lender actively discourages it. You have the right to ask specifically for it by name.

6. Safer Alternatives to a Payday Loan

The reason payday loans exist is legitimate: people need fast cash in genuine emergencies and often have limited access to traditional credit. But the alternatives below consistently offer a faster escape from financial stress at dramatically lower cost — without the 391% annualized clock running against you.

7. How to Use the Payday Loan APR Calculator

Our calculator follows the CFPB’s APR disclosure methodology, converting any quoted flat fee into a standardized annualized rate so you can compare it fairly against any other form of credit.

1. Enter the loan amount: the cash you are borrowing (not the repayment total).
2. Enter the fee: the flat dollar amount quoted by the lender — for example, $15 per $100 on a $300 loan = enter $45.
3. Enter the loan term in days: most payday loans are 14 days; some are 7 or 30 days./li>
4. Read the true APR: the calculator applies the CFPB formula to convert your fee into an annualized rate.
5. Model rollovers: enter 1, 2, 3, and 4 rollovers to see cumulative fee totals at each stage.
6. Compare to alternatives: the output shows what the same cash would cost under a PAL, a personal loan, or a credit card advance.

8. Red Flags Before You Sign Any Payday Loan

If you have exhausted every alternative and a payday loan is genuinely unavoidable, use this checklist to make sure you understand your rights and the lender’s obligations under your state’s law.

• Is the lender licensed in your state? Ask directly and verify with your state regulator.
• Is the fee quoted in dollar terms only — not as an APR? Demand the APR in writing./li>
• Does your state require a free Extended Payment Plan? Lenders are legally obligated to offer it in 16 states.
• Is there a rollover limit in your state? Some states cap rollovers at 2–4 cycles.
• Does the loan require electronic access to your bank account? Understand the withdrawal authorization terms.
• Are there add-on products (insurance, memberships) bundled into the origination fee?
• What happens if the electronic withdrawal fails? Are there additional NSF fees on top of the loan fee?