Slippage Ratio

What it captures

The slippage ratio measures how fast a bank's healthy loans are turning bad. It is calculated as the fresh non-performing assets (NPAs) added during a period, divided by the standard (performing) advances at the start of that period. Where the headline gross NPA ratio is a snapshot of *accumulated* bad loans, the slippage ratio is a *flow* measure — it tells you the *rate* of fresh deterioration. A low slippage ratio means few good loans are souring; a rising one warns that asset quality is freshly cracking, even if the total NPA pile still looks contained.

India's strong recent record

Indian banks have enjoyed a remarkable run of improving asset quality. The slippage ratio for scheduled commercial banks fell for several consecutive years, reaching roughly 1.4% by March 2025 — a sign of genuinely healthy lending. This sits alongside a system gross NPA ratio at a multi-decade low of around 2.1% and net NPAs near 0.5%, with a large share of NPA reduction coming from recoveries and upgrades rather than mere write-offs.

A caution flag

The picture is not uniformly rosy. In FY26, fresh slippages rose meaningfully — by around a quarter year-on-year in one early quarter — but the deterioration was concentrated in microfinance and unsecured retail rather than broad-based. This concentration is exactly the kind of early signal the slippage ratio is designed to surface: trouble building in specific segments before it shows up in the aggregate NPA figure.

There is also a structural split. Private banks have run higher slippage ratios than public-sector banks for several years, partly because PSBs are more skewed towards lower-risk secured lending like mortgages.

Why investors should track it

For anyone analysing a bank, the slippage ratio is a forward-looking complement to the gross NPA ratio. The gross NPA figure tells you the damage *already* done; the slippage ratio tells you how fast *new* damage is occurring. A bank with low and falling slippages is keeping its loan book clean in real time, while a bank with rising slippages — especially in stressed segments — is heading for higher credit costs ahead, even if its current NPA ratio still looks comfortable. Reading the two together gives a far sharper view of where a lender's asset quality is genuinely heading.