US credit card limit calculator
Enter one applicant or cardholder. The US credit limit is the lowest of the behaviour limit, affordability limit, the lender's own income cap and the US ability-to-pay figure, and the tool names which one binds.
Credit limit
The limit is $10,000, set by affordability limit. Behaviour gives $12,000, income carries $10,000, and the market’s rules allow $10,000, which reflects an income cap in some markets and a repayment test in others.
High utilisation with enough statements paid in full earns the large increase.
Candidate limits
The lowest candidate is the limit, and a candidate with no cap has no bar.
Market rules for this person
| Rule | Cap for person | Applies |
|---|---|---|
| There is no cap on the limit, and the minimum payment on the full limit, 5% of it, has to fit in what income leaves after other debt payments. | $10,000 | Yes |
These summaries cover each regulator’s rule for this tool and do not reproduce the full text. The issuer checks the current text. The lowest applicable cap is the market’s cap.
Behaviour decision table
| Months on book | Missed payments | Utilisation | Paid in full | Limit action |
|---|---|---|---|---|
| <6 | ANY | ANY | ANY | Hold limit |
| >=6 | >=2 | ANY | ANY | Cut by 50% |
| >=6 | 1 | ANY | ANY | Hold limit |
| >=6 | 0 | >=70% | >=50% | Raise by 50% |
| >=6 | 0 | >=70% | <50% | Hold limit |
| >=6 | 0 | >=30% | ANY | Raise by 25% |
| >=6 | 0 | <30% | ANY | Hold limit |
Rows paste as decision table cells, and the first matching row wins.
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Run these limit rules inside the credit decision for every application and cardholder, read limits held elsewhere from the bureau at that moment, and test threshold changes on past decisions before they go live. Start free
Show formulas
Behaviour limit, New applicant = Starting income multiple × Monthly net income Behaviour limit, Cardholder = Today’s limit × (1 + Large increase | Small increase) or × (1 − Cut after missed payments) Affordability limit = (Income share for all debt payments × Monthly net income − Other debt payments) ÷ Card payment share of limit Own income cap = Own income cap × Monthly net income Market = Lowest applicable market cap Credit limit = min(Behaviour limit, Affordability limit, Own income cap, Market), Rounded down Rounding step
The affordability limit assumes the card is fully drawn, and the behaviour rules are an example policy to edit, not a standard. Regulatory caps are summaries for this tool and are not legal advice.
How US credit card limits are set
Regulation Z, 12 CFR 1026.51, requires an issuer to consider whether a person can make minimum payments with the full credit limit drawn, using income or assets after current obligations. The United States sets no cap on the limit, so the tool models the rule using income left after other debt payments and the card's minimum-payment share, the same calculation used for its affordability limit.
The tool takes the lowest of the behaviour limit, affordability limit, the lender's own income cap and the figure from the United States rule, then names which one sets the credit limit. Use the result to review one applicant or cardholder and edit the example behaviour policy.
US credit limit questions
How is a credit card limit determined in the US?
The tool compares a behaviour limit, an affordability limit, the lender's own income cap and the US ability-to-pay calculation. The lowest sets the credit limit, and the tool names it.
Does the CARD Act set a credit limit cap in the US?
No. Regulation Z, 12 CFR 1026.51, sets no cap on the credit limit. It requires the issuer to consider whether the person can make minimum payments with the full limit drawn, based on income or assets after current obligations.
How does income affect a US credit card limit?
The tool subtracts other debt payments from the share of income available for debt payments, then divides what remains by the card's minimum-payment share. That produces the affordability limit and the figure used to model the US ability-to-pay rule.
What rules apply to US credit limit increases?
The CARD Act ability-to-pay rule requires the issuer to consider whether the person can make minimum payments with the full limit drawn. The tool also applies an example behaviour policy to the cardholder's utilisation and payment history.
How is a credit line assigned for a new card in the US?
For a new applicant, the tool starts with a behaviour limit based on monthly income. It compares that amount with the affordability limit, the lender's own income cap and the US ability-to-pay figure, and the lowest sets the limit.