Here's what revolving credit is and how it works

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Revolving credit refers to accounts that let you borrow, repay, and borrow again within a certain limit and terms. Common revolving credit accounts include:

• Credit cards. Credit cards are attached to unsecured credit limits you can use for everyday spending. This is the most common form of revolving credit. Credit limits — how much you can spend at one time without paying anything back — vary widely and depend on factors such as card issuer policies, your credit history, and your income.
• Home equity lines of credit (HELOCs). This is a line of credit secured by equity in your home. Often, people take out HELOCs to fund larger purchases, such as home renovations. A downside to HELOCs is that your home is at risk if you don't make the required payments.
• Personal lines of credit. These lines of credit are unsecured, so lenders base approval mostly on your credit history and income. Personal lines of credit are often used to support flexible borrowing or ensure access to emergency funds. 
• Business lines of credit. These accounts are similar to personal lines of credit, but they're for businesses. They can help a business owner manage cash flow and operating expenses. 
• Retail store credit accounts. These are credit lines or cards that can only be used for purchases at a specific business. They're often used for promotional financing. Stores may offer a certain percentage off or short-term interest-free financing if you use their branded line of credit. 

Revolving credit works via a literal revolving principle. What comes out must go back in, typically with interest. Here's how it works:

• The lender sets a credit limit. Your credit limit is based on factors such as your creditworthiness. For example, a credit card lender might approve you for a card with a $3,000 limit.
• You can borrow against the limit. If you make a $200 purchase with that credit card, you're borrowing $200 against the $3,000 limit.
• As you spend and pay back, your available balance changes. Spend $200, and the available balance on that card is $2,800. Make a $100 payment, and the available balance goes up to $2,900.
• You make payments as agreed. Payments are usually made monthly. You must make a minimum payment, which is typically calculated based on how much credit you used. You can also pay more each month — up to the total amount of credit you've used.
• Interest usually accrues. If you carry a debt balance from month to month, interest accrues on that amount. This increases how much you owe (and reduces your available balance). The exception is a card or account with a 0% introductory offer, which means you don't pay interest for a certain number of months.

Revolving credit offers benefits when integrated into well-managed personal or business finance. However, it also comes with some disadvantages.

Pros of revolving credit

• Flexibility. Having credit at your disposal makes it easier to manage cash flow. For example, imagine you see an item you're planning to buy next week at a deep discount, but it's not payday yet. You could buy the item on credit and pay the amount off as soon as you get paid.
• Credit-building potential. Responsible use of revolving credit can help you build credit history and positively impact your credit score. Credit scoring models account for credit mix — whether you've demonstrated you can handle revolving and installment credit — in determining your score.
• Interest only on the balance. You only pay interest on any balance you use. That lets you keep credit on hand for emergencies without steep finance fees.
• Added security. Most credit cards come with more security protections than a bank debit card. Many people choose to use credit cards and pay off the balances regularly for this reason.

Cons of revolving credit

• High interest rates. While your rates depend on the credit type, your credit history, and other factors, revolving credit tends to have higher rates than installment loans. That's especially true with unsecured revolving credit.
• Overspending risk. When you have convenient access to cash flow, it's easy to spend above your budget. That can lead to a financial crunch, where you're struggling to pay down large credit card balances without sufficient income to make a significant dent in the debt.
• Potential credit score damage. If you don't manage your revolving credit well, it can cause your credit score to drop substantially.

Revolving credit can be good or bad for your credit score. Credit scores are based on five main factors: payment history, credit utilization, credit age, credit mix, and inquiries. Here's how revolving credit impacts the first four, for better or worse:

• Payment history. Paying your bills on time is a huge benefit to your credit history. A revolving account offers you the chance to demonstrate good payment habits. At the same time, missing payments can drag your credit score down.
• Credit utilization. The percent of your credit limit you use is your utilization rate. If your limit is $1,000 and your balance is $500, your utilization is 50%. A higher utilization can decrease your credit score — an ideal utilization rate is 10% or below.
• Credit age. The average age of your credit accounts impacts your score. Credit card accounts are often easy for people to open (even with limited credit history) and can grow older over time, which positively impacts your credit score.
• Credit mix. Credit scoring models like to see that you can manage multiple types of credit well. Adding a revolving credit account to your credit history can help boost your score when you manage it well.

The benefits of revolving credit are strongest when accounts are used wisely. Follow these tips to get the most from your account:

• Don't spend more than you can. Make a budget and spend within it, even when you're using revolving credit.
• Pay off balances regularly. Pay off your balances every month to avoid interest charges.
• Make more than the minimum payment. When you must carry a balance forward, pay more than the minimum. Paying extra each month can significantly reduce the time it takes to pay off balances.
• Keep balances low. Reducing credit utilization helps your credit score, so avoid maxing out your credit accounts.