π¦ NSFR Calculator
Basel III\'s test of long-term funding stability.
Available / required stable funding
Estimates for planning only, not financial advice.
The Net Stable Funding Ratio divides a bank's available stable funding by its required stable funding, and Basel III demands at least 100 percent. With $950 million of stable funding against $800 million required, the NSFR is 118.75 percent: a comfortable pass. The rule forces banks to fund long-term assets with long-term money instead of rolling overnight borrowing against 30-year loans.
How to Use This Calculator
Enter available stable funding (capital plus liabilities weighted by stability: retail deposits count highly, short wholesale funding barely) and required stable funding (assets weighted by how much stable funding they need). The calculator returns the ratio and the pass/fail against the 100 percent minimum.
Enter available stable funding in millions, applying Basel ASF factors to capital and liabilities.
Enter required stable funding, applying RSF factors to assets and off-balance-sheet exposures.
Read the ratio. For the short-term liquidity twin, research the Liquidity Coverage Ratio alongside.
The NSFR Formula
ASF weights funding by stickiness: Tier 1 capital at 100 percent, stable retail deposits at 95 percent, less-stable deposits at 90 percent, wholesale funding under six months at 0 percent. RSF weights assets by liquidity: cash at 0 percent, high-quality securities low, loans high, with longer maturities needing more. The calibration punishes maturity transformation funded hot.
Worked Example
A regional bank computes $950 million of available stable funding: mostly retail deposits and capital. Its loan book and commitments require $800 million. NSFR = 950 / 800 = 118.75 percent. The 18.75 point buffer absorbs deposit outflows or asset growth without breaching the minimum. If wholesale funding replaced $200 million of deposits, ASF would fall and the buffer would shrink fast.
Reading Your Result
Above 100 percent is compliant; supervisors watch the buffer, not just the line. A bank sliding from 120 to 102 percent is telling you its funding mix is deteriorating even while technically passing. Below 100 percent triggers supervisory action and funding plan demands.
My rule: NSFR is structural, LCR is cyclical. The Liquidity Coverage Ratio asks whether you survive 30 days of stress; NSFR asks whether your business model is funded sustainably over a year. A bank can pass one and fail the other, and the failures mean different things. When reading any bank's health, check both, then look at what the ratios hide: off-balance-sheet commitments and the stickiness assumptions behind the deposit factors. This is a simplified planning tool; real NSFR reporting follows the full Basel factor tables in your jurisdiction.
For non-bankers, the takeaway is the principle: match funding duration to asset duration. Any leveraged balance sheet, corporate or personal, gets safer when long-term commitments rest on long-term funding.
Estimates for planning only, not financial advice.
Frequently Asked Questions
What is the Net Stable Funding Ratio?
A Basel III liquidity standard: available stable funding divided by required stable funding, which must stay at or above 100 percent. It ensures banks fund long-term assets with stable, long-term liabilities rather than flighty short-term borrowing. The US final rule took effect in 2021, phased in for the largest banks first.
What counts as available stable funding?
Capital and liabilities weighted by stability: regulatory capital at 100%, stable retail deposits at 95%, less-stable deposits at 90%, longer-term wholesale funding at 100% or 50%, and wholesale funding under six months at 0%. Stickier money counts more. Operational deposits from clearing and custody get favorable 50 percent treatment.
What is required stable funding?
Assets and off-balance-sheet exposures weighted by the stable funding they need: cash at 0%, high-quality liquid assets low, performing loans higher, with longer maturities and encumbrance raising the factor. Illiquid long assets demand the most stable funding. Off-balance-sheet commitments get RSF factors too: undrawn credit lines are not free.
Why 100 percent?
At 100 percent, stable funding exactly covers the stable funding the balance sheet requires: the bank is structurally self-sufficient for a year. Below 100 percent it depends on rolling short-term funding, the pattern that amplified the 2008 crisis. Silicon Valley Bank's failure was a liquidity story: stable funding matters more than capital ratios suggested.
How is NSFR different from LCR?
The Liquidity Coverage Ratio covers 30-day acute stress with high-quality liquid assets; NSFR covers structural funding over one year. LCR is the sprint, NSFR the marathon. Banks must satisfy both. LCR uses 30-day stressed outflows; NSFR uses one-year structural weights: different lenses.
Which banks must comply?
Basel III jurisdictions apply it to internationally active banks, with the US implementing it for large banking organizations. Smaller banks face simpler liquidity expectations but the same economic logic applies. The EU applies it to all banks; the US targets firms above $100 billion in assets.
What happens if a bank breaches 100%?
Supervisory consequences: remediation plans, restrictions on growth or distributions, and intense monitoring. Markets also punish it: funding costs rise as counterparties see the weakness. Remediation plans typically demand a credible path back above 100 percent within months, plus weekly liquidity reporting until restored.
Can NSFR be gamed?
The factors are standardized to limit gaming, but assumptions about deposit stickiness and asset liquidity are judgmental. Supervisors review the classifications, and sudden reclassifications draw questions. The 2023 banking stress tested every assumption: deposit stickiness proved weaker than modeled, especially for uninsured balances.
Does NSFR apply to non-banks?
Not as a rule, though insurers and large funds face analogous liquidity expectations. The economic principle, match funding duration to asset duration, applies to any leveraged balance sheet. Money market funds face SEC liquidity rules instead: same spirit, different plumbing.
Why did regulators create NSFR after 2008?
Because banks funded long-term assets with overnight wholesale money that vanished in the crisis, forcing fire sales and bailouts. NSFR attacks that maturity mismatch directly by pricing stable funding into the business model. Northern Rock's 2007 collapse was the poster child: overnight funding against long mortgages.