You don't have to pay your bill in full to have your payment count as on-time; you only have to pay the minimum (though that isn't there to do you any favors – it's there to keep you in debt: You'll be paying lots of interest, and paying off your balance for years). However, if it's all you can afford, you're better off making the minimum payment on time than not making a payment at all. The important thing to remember here is that a consistent history of on-time payments will cause your credit rating to rise.
Making your credit payments on time is one of the biggest contributing factors to your credit scores. Some banks offer payment reminders through their online banking portals that can send you an email or text message reminding you when a payment is due. You could also consider enrolling in automatic payments through your credit card and loan providers to have payments automatically debited from your bank account, but this only makes the minimum payment on your credit cards and does not help instill a sense of money management.
A third of your overall credit score is based on the credit utilization ratio across all of your cards. Because of the way credit scoring works, it's better to carry a $1,000 balance on a card with a $5,000 limit (20% credit utilization) than to carry a $500 balance on a card with a $1,000 limit (50% credit utilization). That's why, in discussing payment pecking order, we recommended paying off the cards closest to being maxed out. That's also why you shouldn't terminate accounts. It'll increase the percentage of total available credit that you’re using – and that will reduce your score.
Each time you apply for credit is listed on your credit report as a “hard inquiry” and if you have too many within two years, your credit score will suffer. In general, a consumer with good credit can apply for credit a few times each year before it begins to affect their credit score. If you’re already starting with below-average credit, however, these inquiries may have more of an impact on your score and delay your ultimate goal of watching your credit score climb.