Short Answer:

When requesting a credit limit increase (CLI), you can either specify an amount or let the issuer decide. Specifying a reasonable amount shows that you have considered your spending needs and repayment capacity.

However, letting the issuer decide can be safer if you are unsure what amount is appropriate. Issuers will evaluate your income, payment history, and credit usage to determine a limit you can manage responsibly. Both approaches can work if you maintain disciplined credit behavior.

Detailed Explanation:

Specifying an Amount

Requesting a specific credit limit increase demonstrates that you have carefully assessed your financial needs and repayment capacity. When you suggest a reasonable amount, you give the issuer a clear target and make it easier for them to evaluate your request. A well-chosen amount shows confidence and responsibility, particularly if it aligns with your income and current usage patterns.

Letting the Issuer Decide
Alternatively, you can allow the issuer to decide the credit limit increase. This approach is useful if you are unsure of a reasonable increase or prefer to avoid requesting too high an amount. Issuers will review your account, payment history, income, and credit utilization to determine a suitable increase that aligns with your financial profile. This can reduce the risk of denial or unnecessary hard inquiries.

Factors to Consider
Before deciding, consider your income, current balances, spending habits, and repayment history. If your usage is moderate and payment history strong, specifying an amount within a safe range can work well. If your financial situation is complex or your card is relatively new, letting the issuer choose may lead to a more favorable and risk-free limit adjustment.

Impact on Approval Chances
Specifying an amount shows initiative but must be realistic. Asking for too high an increase may lead to denial, while a conservative request may be approved easily. Letting the issuer decide relies on their assessment, often resulting in an amount you can manage comfortably. In both cases, disciplined credit usage, timely payments, and low utilization are critical for approval.

Strategic Approach
A balanced approach may work best: know your target limit and have a justification ready, but remain flexible if the issuer offers a different amount. Communicating clearly and providing accurate financial information increases trust and improves your likelihood of receiving a favorable CLI.

Conclusion

You can either request a specific amount or let the issuer decide when asking for a CLI. Specifying a reasonable amount shows planning and responsibility, while letting the issuer choose reduces risk if unsure. The key to approval is disciplined spending, on-time payments, and low credit utilization, regardless of which approach you take.