How to work out what a card costs

Larkmoor Card (fictional example) → Credit card to apply for → Costs stated up front → Soft check before a hard inquiry

Content reviewed 8 November 2026. How this is assessed.

Part of the Best Credit Cards to Apply For reference, which uses Larkmoor Card (a fictional example) to illustrate credit cards to apply for criteria.

Build the sum

Start with twelve months and your own spending. Take the annual fee, then add the interest you expect to pay. If you clear the balance in full each month and the card gives you a grace period, that may be nothing. If you carry a balance, estimate the average amount you will owe through the year and multiply it by the purchase rate. That gives you a rough annual interest cost, which is enough to compare two cards fairly.

Next, add the fees your use will trigger. A foreign transaction fee applies only if you spend abroad, and a balance transfer fee applies only if you move a balance. Late fees should not be in your plan, but if you have paid late in the past year it is more honest to include one than to assume it will not happen again.

Be strict about rewards and promotions

Rewards reduce the cost only if you will earn them and use them. Count what your real spending would earn, at the rate that applies to your real categories, and leave out any bonus that needs you to spend more than you otherwise would. Spending extra to reach a bonus is a cost, not a saving, and it should not appear on the benefit side of the sum.

Treat a promotional rate as temporary, and work out the cost after it ends. The CFPB lists the end of a promotional rate among the exceptions that let a card company raise the rate on existing purchases, so any balance you still hold at that point can move to a higher rate.

Run it twice

Do the sum once for a normal year and once for a harder year in which you carry a larger balance for longer. A card that wins when you pay in full can lose badly if you do not, and rewards rarely cover the interest on a balance you carry for months. Most people should choose the card that holds up in the second version, not the one that looks best in the first.

Keep the working with your application brief, and repeat it if your spending changes. The figures come from the issuer's own published terms, so check them on the day you plan to apply and note the date beside them.

Sources for this entry

• CFPB: What is a credit inquiry?: Hard and soft inquiries and their effect on scores.
• CFPB: Unsolicited credit card offers: Prescreened offers and how to opt out.
• CFPB: When a card company can look at your reports: When an issuer can see your full credit report.
• CFPB: Age and credit card issuance: The general rule for applicants under 21.
• CFPB: When a card rate can increase: Notice periods and exceptions.
• CFPB: How to rebuild your credit: How secured cards work.
• FTC: Free credit reports: Free weekly reports and disputing mistakes.
• FTC: Credit scores: Scoring factors and differences between models.
• Experian: Pre-approved vs. pre-qualified: What a preliminary check does and does not mean.

Continue this reading path

• Best Credit Cards to Apply For category guide
• Larkmoor Card (fictional example)
• How to choose: a credit card to apply for
• Resource directory

Cite this entry

Best Credit Cards to Apply For. "How to work out what a card costs." Content reviewed 8 November 2026. https://bestcreditcardstoapplyfor.com/cost-model/