Finance

Business Credit Card Monthly Interest Calculator (30 Years)

Estimate monthly interest on a card balance. This business version uses a 30-year planning term as its starting point.

In real terms, the Monthly interest figure is the cost of carrying the balance for one month, so a payment equal to it does not reduce the balance, and only a larger payment brings the balance down.

Formula

Monthly interest equals balance times annual rate divided by 100 divided by 12.

How it works

Paying only interest leaves the balance unchanged. Paying more than interest reduces the balance.

Worked example

Balance $5,000, annual rate 18%, term 30 years. Monthly interest is $5,000 times 18, divided by 100, divided by 12, which is $75.00 a month. That is the calculator's own output, and it is the same every month because the balance and rate do not change. If the business pays only interest, after 30 years it has paid $27,000 in interest, which is 540% of the balance, and it still owes the original $5,000. Paying more than $75.00 in any month is what finally reduces that balance.

Who this term suits for a business: a long-term borrowing comparison, where a business weighs a card against a term loan or overdraft over 30 years and sees that $27,000 of card interest is 540% of the balance borrowed.

FAQs

Why is card interest high?
Card rates are usually higher than loan rates, so balances grow quickly if only minimum payments are made.

Is this business calculator exact?
No, it is an estimate for planning only, based on the numbers you enter.

Are these figures financial advice?
No, they are estimates for planning only, not financial advice. Check with a qualified adviser for decisions involving large sums.

Why is $27,000 interest over 30 years a warning, not a plan?
Because the business paid more than five times the borrowed amount in interest and still owes the original $5,000, which is the opposite of paying a debt down.

What cheaper borrowing should a 30-year card user compare?
A business term loan, an overdraft, or a supplier payment plan, each checked for total cost and fees, not just the monthly figure.

Does a 30-year card history help or hurt a business loan application?
It can hurt: a lender may read a never-falling balance as weak cash flow, even if every $75 payment was made on time.

Estimates only, not financial advice. Figures are approximate and do not include all fees, taxes, or changing rates unless stated.