The 30% Rule: A Simple Definition
The 30% rule is a widely recommended guideline in personal finance. It suggests that you should aim to keep the outstanding balance on your credit cards at or below 30% of your total available credit limit. For example, if you have a single credit card with
a limit of ₹1,00,000, your outstanding balance should ideally not exceed ₹30,000 at any given time. If you have multiple cards, the rule applies to your total combined limit. This isn't just arbitrary advice; it's tied directly to a key metric that credit bureaus like TransUnion CIBIL use to calculate your score.
Understanding Your Credit Utilisation Ratio (CUR)
The metric at the heart of the 30% rule is the Credit Utilisation Ratio, or CUR. This ratio is a percentage that shows how much of your available credit you are currently using. It's one of the most significant factors in determining your CIBIL score, second only to your payment history. To calculate your CUR, you divide your total outstanding credit card balances by your total credit card limits and multiply by 100. For instance, if you have two cards, one with a ₹50,000 limit and a ₹10,000 balance, and another with a ₹1,00,000 limit and a ₹15,000 balance, your total balance is ₹25,000 and your total limit is ₹1,50,000. Your CUR would be (25,000 / 1,50,000) * 100 = 16.7%, which is well within the healthy range.
Why a High CUR Hurts Your CIBIL Score
Lenders view a high CUR as a sign of potential financial distress. Consistently using a large portion of your available credit might indicate that you are heavily reliant on debt to manage your expenses. This behaviour makes you appear as a higher-risk borrower to banks and financial institutions. Consequently, credit scoring algorithms, like the one used by CIBIL, are designed to lower your score when your utilisation ratio creeps up. A ratio consistently above 30-40% sends a warning signal, suggesting you might have trouble handling new debt. On the other hand, maintaining a low CUR demonstrates responsible credit management and financial discipline, which positively impacts your score.
Smart Ways to Keep Your Utilisation Low
Staying below the 30% threshold is achievable with a few smart habits. The most straightforward method is to pay your balance in full each month. If that isn't possible, consider making multiple payments throughout the month instead of waiting for the due date. This can help keep your reported balance lower. Another strategy is to request a credit limit increase from your bank. A higher limit automatically lowers your CUR, assuming your spending stays the same. Spreading your expenses across multiple cards can also prevent any single card from having a high utilisation. Finally, avoid closing old, unused credit cards. Keeping them open maintains your total available credit limit, which helps keep your overall CUR down.
Beyond Utilisation: Other Keys to a Good CIBIL Score
While CUR is important, it's not the only factor that shapes your CIBIL score. The most critical element is your payment history. Always paying your EMIs and credit card bills on time is fundamental to building a strong score. Your credit mix, which is the blend of secured loans (like home or auto loans) and unsecured loans (like credit cards and personal loans), also plays a role. A healthy mix is viewed positively. Additionally, the length of your credit history and avoiding too many new credit applications in a short period are also important for maintaining a score that lenders like to see, which is typically above 750.
