A negative interest rate is a monetary policy setting in which a central bank charges commercial banks to keep money on deposit with it, instead of paying them interest as usual. The idea is to make idle cash expensive so banks lend it out, credit gets cheaper, and spending and investment pick up. Central banks in Europe and Japan used this tool between 2014 and 2024 to fight deflation and weak lending. By 2026, all of them had returned to positive rates.
How the Mechanism Actually Works
Commercial banks keep reserves at their central bank. Under normal conditions, those reserves earn a small amount of interest. A negative policy rate flips that. As the Federal Reserve Bank of St. Louis put it, a rate of -0.5% means a bank holding excess reserves loses 0.5% of those funds over a year.1Federal Reserve Bank of St. Louis. A Primer on Negative Interest Rates The charge applies to the central bank’s deposit facility rate, which then influences lending rates, bond yields, and other borrowing costs across the wider financial system.
This is not the same as a maintenance fee your retail bank might charge on a checking account. It is a deliberate policy tool aimed at the plumbing of the financial system. The logic is straightforward: sitting on cash costs the bank money, so lending, even at very low rates, becomes the better option.
Tiering Protects Bank Margins
Charging a fee on every dollar of reserves would badly damage bank profitability, so central banks usually shield part of those balances. The European Central Bank introduced a two-tier system in September 2019 that let reserves up to six times a bank’s minimum requirement earn 0%, with only the excess facing the negative deposit rate.2Banco de España. What Is the Two-Tier System? The Bank of Japan used a three-tier version, applying its negative rate only to a narrow slice of reserves. Tiering keeps the incentive to lend intact while limiting the hit to bank earnings.
Why a Central Bank Would Do This
Negative rates are not a first choice. They tend to come out only after conventional tools, such as cutting the policy rate to zero and buying government bonds, have run out of room. Three motivations do most of the work.
Fighting Deflation
Deflation, a sustained drop in the general price level, encourages consumers and businesses to postpone spending because prices will be lower later. That delay deepens an economic slump. Penalizing idle reserves is meant to push money into circulation and pull inflation back toward the central bank’s target, typically around 2%.
Pushing Banks to Lend
A bank charged for parking reserves has a strong reason to lend instead. Earning a tiny positive return on a loan beats paying a penalty to hold cash. The expanded credit is supposed to fund business investment and consumer borrowing.1Federal Reserve Bank of St. Louis. A Primer on Negative Interest Rates
Holding Down the Currency
For smaller, export-heavy economies, negative rates also discourage foreign money from flowing in and driving the currency higher. Switzerland, Denmark, and Sweden all used negative rates partly to stem safe-haven inflows that were making their exports uncompetitive. The Office of the Comptroller of the Currency found the policy did help slow further rapid appreciation of those three currencies.3Office of the Comptroller of the Currency. Do Negative Interest Rate Policies Actually Work?
What It Means for Depositors
Negative rates squeeze the difference between what banks earn on loans and what they pay on deposits. Banks generally respond with some mix of more lending, higher fees, and repriced products. In practice, that has meant higher charges on checking accounts, wire transfers, and safe deposit boxes to offset the margin pressure.
Pass-through to ordinary savers, where a retail savings account actually pays a negative rate, has been rare. Banks fear mass withdrawals, and the cost of physically storing and insuring cash sets a natural floor: as long as keeping money at a bank is cheaper than renting a vault, most depositors accept a near-zero rate. During the negative-rate era, most individual savers in affected countries saw rates fall to 0.00% or 0.01% rather than turn negative.
Large institutional depositors are a different story. Corporate treasuries and pension funds holding millions in cash cannot easily switch to physical currency, so they are much more likely to absorb a direct negative rate. For them, it functions as a fee for keeping large balances liquid and safe.
What It Means for Bonds and Borrowers
When the policy rate goes negative, government bond yields follow. Sovereign yields in the eurozone and Japan turned negative across multiple maturities during the peak years, meaning investors who bought and held to maturity were guaranteed to get back less than they paid. Global negative-yielding debt reached roughly $18.4 trillion in late 2020 before nearly disappearing once central banks began raising rates again.
Investors still bought these bonds for several reasons. Insurers and pension funds are often required to hold high-grade sovereign debt regardless of yield. Others treated negative-yield bonds as a safer alternative to cash when deposit rates were even worse. The negative yield essentially became a storage fee for the safest asset available.
The other side of the story is cheaper credit. Lower policy rates pull down mortgage rates and corporate borrowing costs, which is the point. Businesses can finance expansion more cheaply, and homeowners see lower payments or refinancing opportunities.
Reach for Yield and Asset Prices
When safe assets pay negative returns, investors move into riskier ones: high-yield corporate bonds, equities, and real estate. This reach for yield can lift asset prices beyond what fundamentals support. Real estate is particularly exposed, because cheaper borrowing directly raises how much buyers can finance, which pushes property values higher.
Where the Policy Runs Out of Room
There is a threshold below which cutting rates further stops helping and starts hurting lending, because bank profitability erodes enough that banks pull back to preserve capital. Economists call this the reversal rate. Research from the Federal Reserve Bank of Philadelphia estimated it at roughly -0.8% for aggregate investment and -1.2% for bank lending in a calibrated model.4Federal Reserve Bank of Philadelphia. The Reversal Interest Rate Those figures sit close to the rates some central banks actually reached, which suggests the policy was operating near its practical limits.
Pressure on Insurers and Pension Funds
Life insurers and defined-benefit pension funds carry long-term guaranteed obligations that become more expensive to fund when rates fall. Lower rates raise the present value of those future payouts faster than they lift the value of existing bond portfolios, opening a capital gap. Many insurers moved into riskier and less liquid assets to chase yield during the low-rate years. The Bank for International Settlements found insurers with heavier exposure to those less liquid holdings proved more vulnerable in difficult market conditions.5Bank for International Settlements. Shifting Landscapes: Life Insurance and Financial Stability
Where Negative Rates Have Actually Been Used
Negative interest rate policies were a post-2008 phenomenon concentrated in Europe and Japan. Every central bank that adopted them has since returned to positive territory, most during 2022 as inflation rose worldwide.
- European Central Bank: cut its deposit facility rate below zero in June 2014, initially to -0.10%. The rate eventually reached -0.50%. The ECB exited in July 2022, raising the deposit facility rate to 0.00%.6European Central Bank. ECB Introduces a Negative Deposit Facility Interest Rate7European Central Bank. Monetary Policy Decisions
- Bank of Japan: adopted -0.10% on a portion of reserves in January 2016, approved by a 5-4 board vote. Japan was the last major economy to exit, ending the policy in March 2024.8Bank of Japan. Minutes of the Monetary Policy Meeting on January 29, 2016
- Swiss National Bank: pushed its rate to -0.75%, one of the deepest among major central banks, largely to curb appreciation of the Swiss franc. The SNB exited in mid-2022.9Swiss National Bank. Current Interest and Exchange Rates
- Denmark: Danmarks Nationalbank held a negative deposit rate for extended periods to defend the krone’s peg to the euro.
- Sweden: the Riksbank cut its main repo rate to -0.10% in February 2015 and reached -0.35% by year-end, cutting again in 2016 before normalizing.10Sveriges Riksbank. Annual Report 2015
Why the United States Didn’t Go Negative
The Federal Reserve considered negative rates after 2008 but never used them. Part of the reason is legal. Federal law authorizes the Fed to pay interest on reserves, but whether it can charge negative interest is unresolved. Former Fed Chair Ben Bernanke noted that the statute permits paying interest on reserves but doesn’t clearly authorize paying a negative amount. Treating the charge as a fee for accepting reserves runs into a separate constraint requiring Fed service fees to reflect actual costs over the long run.11Brookings Institution. What Tools Does the Fed Have Left? Part 1: Negative Interest Rates
The Treasury also sets a practical floor. Since 2011, if a note or bond auction produces a yield below 0.125%, the coupon is set at one-eighth of one percent and the price is adjusted to a premium rather than issuing at a negative nominal yield.12TreasuryDirect. Information on Negative Rates and TIPS Combined with stronger U.S. growth and inflation than in Europe or Japan, that reduced the pressure to try the tool. The Fed relied on quantitative easing instead.
Don’t Confuse This with Negative Real Rates
The negative rates above are negative nominal rates: the stated rate on a deposit or bond is literally below zero. That’s the unusual policy tool. A different situation is far more common: a negative real interest rate, which is the nominal rate minus inflation. If your savings account pays 2% and inflation runs at 4%, your real return is -2%. The balance grows in nominal terms but buys less. Negative real rates have shown up regularly during high-inflation periods in the U.S., including much of the 2020s, without any central bank ever setting a negative policy rate. The two have different causes and different implications, and the distinction matters when reading the news.