Expect a Hard:
Barclay's Business (i.e. Bank Atlantic) - always a hard pull per call on 1/9/09
Chase - almost always - regardless
Citi - when subitting the form online after hitting the cli button: New website design note - button seems to appear / disappear every 90 days or so after a successful CLI.
Discover - when already at or beyond 15k
FNBO - Always hard through form.
No Hard Pull:
Juniper / Barclay's - Call the number on the back of your card and speak to CSR and ask if you qualify for an increase (they did not ask me any income related questions).
Discover (personal) - Discover now has an automated credit limit increase service in their voice response system (number on back of card: 1-800-DISCOVER). The automated system prompts for desired dollar increase in credit limit and annual household income (both of which are keyed in using touchtone phone.) Alternately, a CSR may be able to still take the request. The required wait time between increases is also now up to 6 months. (as of 1-5-09)
US Bank (personal) - Call the number on the back of your card and speak to CSR and ask if you qualify for an increase without hard pull, CSR mentioned every 3 months with usage = at least 20% (they did not ask me any income related questions).
Wells Fargo - Call CSR, Ask for increase without Hard pull. Call back if your CSR says "We have to hard pull/It's a secret".
USAA - Initial check. Can choose to allow inquiry to try for additional review/boost
Citi - No credit check unless rep asks you for income information; cli is instant; otherwise hard will follow
AMEX - Use online form for no-hard CLI. Be warned of Financial Reviews though if you ask for too much. (usually up to $24,999 without additional info needed)
Bank of America - Use online form for no-hard CLI.
WalMart - Use online form for no-hard CLI. Every 6 months usually.
WAMU - Unable to request CLI. Neither online nor over phone. CLI's done "periodically"