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Illinois Loan Calculators

Three free calculators: the true cost of a Illinois advance under the 36% cap, the monthly payment on an installment loan, and the APR view that puts any two offers on one scale.

Every calculator on this page obeys one rule: show the figure your budget needs to see, priced against Illinois’ own cap. The cost calculator prices licensed installment credit at the 36% APR cap beside the sovereign range and returns the monthly payment plus its annualized APR. The installment calculator works out the fixed monthly payment for amounts above the advance ceiling, where APRs run from about 6.63% to 225%. The APR view converts any fee, from any product, into the yearly rate that makes offers comparable.

Nothing typed into a calculator leaves your browser. Once the numbers look manageable, the caps page lists what Illinois permits, and the request form can price a real offer free of charge.

Illinois Payday Cost Calculator

Illinois caps the advance at $600 and prices it by a tiered statutory schedule (15/14/13/12/11% per $100) over a 31-day maximum term. Pick your amount (the default shows the $300 case) and the term, and read the fee in dollars plus the annualized APR.

Fee$42.00
Total due on the due date$342.00
Annualized APR165%

The Illinois rules page explains the caps; the full schedule is on the caps page.

Installment Loan Payment Calculator

Above the $600 ceiling, borrowing becomes an installment product priced in APR. Set the amount, the APR, and the term to see the monthly payment, the total of payments, and what the borrowing actually costs in interest.

Monthly payment$305.82
Total of payments$1,834.89
Total interest$534.89

Typical online installment pricing runs from about 6.63% to 225% APR. The Illinois installment page explains how to compare offers.

APR Calculator: Any Offer, One Scale

Enter any amount, any flat fee, and any term; the tool returns the annualized APR, the per-$100 reading, and the full repayment. It is the cleanest way to weigh a Illinois advance against an installment or sovereign offer.

Annualized APR165%
Per $100 borrowed$14.00
Total repayment$342.00

The defaults show Illinois's standard case. The APR disclosure carries the complete ranges.

Dedicated calculator pages

Field notes: tribal loan questions, answered straight

Are these calculators free to use?
Yes. Every calculator here runs inside your browser and costs nothing to use; there is no signup, nothing you enter leaves the page, and none of it reaches a lender.
How is the monthly payment calculated?
Through the standard amortization formula: principal multiplied by the monthly rate and its compounding growth, divided by that growth less one. A $1,300 loan at the state's 36% APR cap over twelve months runs about $130.60 a month and $1,567.21 in total. The tool restates any APR offer the same way.
Why is there no payday loan calculator for Illinois?
Because there is no licensed payday product to calculate: the statute sunset in 2001 and the state licenses no two-week loan at any price. The first calculator below prices what the law actually allows instead: licensed installment credit at the 36% cap, beside the rates the unlicensed and sovereign markets charge.
Why does the calculator disagree with my lender's offer?
Installment contracts fold origination charges and add-on products in different combinations, and sovereign lenders price outside state licensing altogether. Treat the calculator as your comparison baseline and the signed disclosure as the number that legally binds.
What APR should I expect in Illinois?
Licensed consumer finance installments cap at 36% APR under Illinois law, credit union PALs cap at 28% by federal rule, and bad-credit online offers run into the triple digits. Sovereign installment offers commonly run 400% to 800% APR across months, disclosed rather than capped.
Which calculator should I start with?
Match the tool to the question: the licensed-cost calculator prices what the 36% cap buys, the installment calculator models any fixed-payment offer, and the APR calculator converts any flat fee into a yearly rate. When in doubt, start with the APR view; it sizes up any two offers directly.

Reviewed by Cal Brooks, Reviewer, credit counseling background. Every fee, cap, and formula on this page was checked against 815 ILCS 123 and the regulator that enforces it.

Last reviewed: 2026-10-15

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