A credit limit increase (CLI) gives you increased spending power and more leeway to keep your credit utilization ratio in check. Chase credit limit increases may happen in two main ways. One is when the bank decides to boost your credit line on its own, and the other requires you to request an increase.
If you request a credit limit increase, you can expect Chase to carry out a hard inquiry, which can temporarily cause a dip in your credit score. If Chase denies your CLI request, find out why and follow remedial measures to correct the situation. Once you do, you may request a credit limit increase again. Alternatively, you may consider applying for a new card.