How Is Your Credit Score Actually Calculated?

A CIBIL score feels like a black box until you break it into what it's actually built from, four weighted factors, not one mysterious calculation.

The score range

CIBIL scores in India run from 300 to 900. Below roughly 700 starts to limit your options and pricing, 700-749 is generally considered good, and 750 and above is considered excellent, typically unlocking the fastest approvals and the most competitive interest rates.

The four factors, and their approximate weight

Payment history: the single biggest lever

Consistently paying on time matters more than any other factor here. A single missed payment, especially one that goes 30+ days overdue, can meaningfully dent a score that took years to build, and the effect lingers in your credit history for a while even after the payment is made. This is the one factor almost entirely within direct, immediate control: set up auto-pay for at least the minimum due on every card and loan, and the payment-history factor takes care of itself.

Credit utilisation: less obvious, still significant

This is the ratio of how much credit you're using against how much is available to you. Keeping this below roughly 30% is the commonly cited threshold, even if you pay your full statement every month and never carry a balance. A ₹1 lakh credit limit with ₹85,000 regularly outstanding looks different to the scoring model than the same ₹1 lakh limit with ₹20,000 typically outstanding, even if both get paid off in full each cycle, since utilisation is often measured at the statement date, not after payment.

Credit type and duration: why closing your oldest card can backfire

A longer credit history generally helps the score, and a healthy mix of credit types (a mix of, say, a home loan and a credit card, rather than only credit cards) signals more rounded credit management. This is why closing your oldest credit card, even one you rarely use, can quietly hurt your score: it shortens your average account age and reduces your total available credit, which can push your utilisation ratio up even if your spending hasn't changed.

What doesn't directly affect the score

Checking your own credit score (a "soft inquiry") doesn't affect it. Income level isn't a direct input either, though lenders consider it separately alongside your score when deciding how much to actually lend. Multiple hard inquiries in a short window, applying for several loans or cards back to back, can have a small negative effect, since it can look like sudden financial stress to the scoring model.

The takeaway

Pay on time, every time, that's the single largest lever. Keep utilisation comfortably under 30% even if you always pay in full. Don't close old credit accounts casually. And avoid applying for multiple new credit lines in a short window unless there's a real need to.

This article is educational and not personalised financial advice. Credit scoring models and weightings can vary and change over time; check your actual report through an authorised source for your current score.