NSFR Calculator

What is the Net Stable Funding Ratio (NSFR)?

The Net Stable Funding Ratio (NSFR) is a key regulatory metric introduced under the Basel III framework. It measures whether a bank has enough stable funding to support its long-term assets and activities over a one-year horizon of extended market stress.

Unlike the Liquidity Coverage Ratio (LCR), which focuses on short-term liquidity (30 days), the NSFR addresses structural funding risks. It was introduced after the 2008 financial crisis to prevent banks from relying too heavily on short-term wholesale funding and to encourage more sustainable funding profiles.

How to Calculate NSFR

The NSFR formula is straightforward:

$$ \text{NSFR} = \frac{\text{Available Stable Funding (ASF)}}{\text{Required Stable Funding (RSF)}} \times 100\% $$

Where:

• Available Stable Funding (ASF) is the portion of a bank's liabilities and capital that is expected to be reliable over a one-year time horizon. Different funding sources are assigned different ASF factors based on their stability. For example, regulatory capital receives a 100% factor, stable retail deposits get 95%, and short-term corporate funding may receive only 50%.
• Required Stable Funding (RSF) is the amount of stable funding regulators require the bank to hold, calculated based on the liquidity characteristics and residual maturities of its assets and off-balance-sheet exposures.

Interpreting the NSFR

According to the Basel III accord, every bank is required to maintain an NSFR of at least 100%. An NSFR above 100% means the bank has more than enough stable funding to cover its required funding needs. A ratio below 100% indicates potential vulnerability and may trigger regulatory action.

The higher the NSFR, the better positioned the bank is to withstand long-term market disruptions without having to sell assets at fire-sale prices or cut lending during a crisis.

ASF Factors for Common Funding Sources

The Basel III framework assigns different ASF factors to funding sources based on their reliability:

• 100% - Regulatory capital, long-term borrowings (maturity >1 year)
• 95% - Stable retail and small business demand deposits
• 90% - Less stable retail and small business deposits
• 50% - Unsecured wholesale funding from non-financial corporates
• 0% - Funding from financial institutions and other short-term sources

NSFR vs LCR

While both ratios were introduced under Basel III, they serve different purposes. The LCR ensures banks can survive a 30-day liquidity stress scenario, whereas the NSFR addresses longer-term structural funding mismatches. Together, they create a comprehensive framework for managing both short-term and long-term liquidity risk.

You can also check our LCR Calculator for short-term liquidity analysis.