EURIBOR Explained

There is a number on almost every Belgian variable-rate business loan. It is not the margin — that part is negotiable. It is not the total rate either, that’s just arithmetic. It is a five-letter acronym, and most borrowers spend thirty seconds reading it before moving on.

EURIBOR. Euro Interbank Offered Rate.

It appears on your term sheet like this: “3-month EURIBOR + 1.80%”. Or: “EURIBOR 6M + 2.25%”. Sometimes just “EURIBOR + margin”, with no tenor specified — which, as we will get to, is the version you should push back on.

What follows is a complete explanation of what EURIBOR is, why banks use it, and why the tenor — 1, 3, 6, or 12 months — matters far more than most borrowers realise. If you are still working through the basics of your term sheet, start with our term sheet reading guide first.

What EURIBOR Actually Is

EURIBOR is the rate at which European banks lend money to each other on the interbank market. Not to you — to each other. It is published every business day at around 11:00 CET by the European Money Markets Institute (EMMI). It is public. You can look it up right now on the ECB website.

Here is the key thing: EURIBOR is not one number. It is a family of five rates, one for each tenor:

Each one moves independently. On any given day, the 12-month rate might be 3.45% while the 1-month rate is 2.90%. Or they might be almost identical. And sometimes 1-month might actually be higher than 3-month. More on that shortly.

The rate you care about is whatever tenor your bank chose for your loan. That choice has consequences for your total borrowing cost, your rate reset exposure, and your ability to plan cash flow.

Why Banks Use EURIBOR Instead of Setting Their Own Rate

Here is a question most borrowers never ask: why don’t banks just quote you a flat rate? Why tie it to some external index?

The honest answer is asset-liability matching.

Banks borrow money from the market to fund your loan. They take deposits, issue bonds, borrow from other banks in the interbank market. Those funding sources have different durations — some roll monthly, some quarterly, some annually. The bank’s treasury desk manages this constantly.

When a bank lends you money at 3-month EURIBOR + 1.80%, they are doing two things simultaneously. First, they are reflecting their own funding cost. Second, they are creating a natural hedge: when EURIBOR moves, both their cost of funds and your loan rate move together. Their spread (the margin) stays constant regardless of where rates go.

For you, this means the margin is what the bank actually negotiates. EURIBOR is the pass-through — the part of your interest bill that reflects market conditions, not the bank’s pricing decision. When EURIBOR falls, your cost falls automatically. When it rises, you pay more — not because the bank decided so, but because that is the structure you agreed to.

The Five Tenors — What Makes Each One Different

The differences between EURIBOR tenors are not random. They reflect the market’s view of where interest rates are going over different time horizons.

1-month EURIBOR reflects the market’s expectation for the very near term — essentially, where rates will be over the next four weeks. It is the most volatile of the tenors, reacting quickly to news, ECB signals, and market stress. Because it resets so frequently, it usually stays close to the ECB’s deposit facility rate.

3-month EURIBOR is the most widely used tenor in European corporate lending. It reflects a 90-day outlook. It moves more smoothly than 1-month because it averages out short-term noise. Quarterly resets align naturally with quarterly financial reporting — which is why most loans with quarterly interest payments use 3-month EURIBOR.

6-month EURIBOR embeds a half-year view of interest rate expectations. Loans with this tenor reset twice a year. For borrowers, this is a slightly longer lock-in — you are less exposed to sudden rate spikes, but you benefit more slowly when rates fall.

12-month EURIBOR reflects where the market thinks rates will be in a year. It is the most stable of the liquid tenors. Loans tied to it reset once per year. The trade-off: if rates fall significantly mid-year, you are still paying the rate set twelve months earlier.

1-week EURIBOR almost never appears on term sheets. It is used primarily for short-term liquidity instruments and overdraft facilities.

Why the Tenors Are Not Always Ranked in Order

This surprises many borrowers. You would expect 12-month EURIBOR to always be higher than 3-month, which should always be higher than 1-month. Longer duration = more uncertainty = higher rate. That is the normal shape of the yield curve — upward sloping.

But sometimes the curve inverts.

When markets expect the ECB to cut rates in the near term, short-dated rates start to fall in anticipation — while longer-dated rates still reflect higher levels from further in the future. This happened in Europe during 2023 and into 2024 as markets began pricing in the end of the ECB’s hiking cycle. The 12-month EURIBOR peaked and started declining before the 1-month did.

Why does this matter for your loan? Two reasons. First, if your term sheet specifies 1-month EURIBOR and the curve has inverted, your starting rate might be higher than if you had negotiated 3-month. In a normal environment, 1-month is usually the cheapest tenor. Not always.

Second, when the curve is inverted, locking in a longer tenor is often the better bet for the bank — they lock in today’s higher rate for longer. This is exactly why banks sometimes push for longer tenors when the curve is inverted. Know which environment you are in.

What the Gap Between Tenors Actually Signals

When the EURIBOR yield curve slopes upward (3-month at 2.12%, 6-month at 2.31%, 12-month at 2.53%), the natural instinct is to read it as a forecast: the market expects rates to be higher in a year. That reading is wrong, or at least incomplete. It matters because the mistake leads borrowers to conclusions about rate direction that the curve does not actually support.

The gap between tenors reflects two separate forces, not one. The first is genuine rate expectations: if markets believe the ECB will raise rates over the next twelve months, longer tenors will price that in and trade above shorter ones. The second is term premium: investors who commit money for longer periods demand extra compensation for that commitment, for inflation uncertainty, liquidity risk, and the simple inconvenience of locking in. This premium exists even when nobody expects rates to move at all.

In practice, the two effects are inseparable just by looking at spot rates. A normal upward-sloping curve with 12-month trading 40 basis points above 3-month is consistent with stable rate expectations combined with a modest term premium. It is also consistent with a mild rate-rise expectation combined with no premium. You cannot tell which from the spot curve alone.

The tool that actually answers the rate-direction question is the OIS forward curve: the implied forward rates derived from the Euro Short-Term Rate (€STR) swap market. These represent the market’s best estimate of where short-term rates will be at specific future dates. When the OIS-implied 3-month rate for December 2026 sits below today’s 12-month EURIBOR spot rate, the market is not pricing in rising rates. The upward slope is explained almost entirely by term premium.

The one shape that is unambiguous is the inverted curve. When shorter tenors trade above longer ones, term premium logic runs the wrong way. Nobody demands a discount for committing money longer unless they genuinely expect short-term rates to fall. An inverted curve is a clear market signal that rate cuts are being priced in. This is exactly what the 2023–2024 European curve showed as markets began anticipating the end of the ECB hiking cycle.

How Banks Choose Which Tenor to Use

The honest answer, confirmed by analysing hundreds of real Belgian and European term sheets, is that banks almost never explain the tenor choice in the document itself. The logic is inferred from the pattern, not stated. Here is what the pattern actually reveals:

1. Covenant test cycle — the real driver. Belgian banks test financial covenants quarterly. The EURIBOR reset date is structured to align with the covenant test date so the bank’s full picture (rate and compliance) refreshes at the same time. When you see 3-month EURIBOR on an amortising term loan, this is almost always why. The “market standard” explanation your banker gives you is accurate; the reason it became standard in the first place is covenant timing.

2. Facility type determines tenor as much as tenor determines anything. Analysis of real term sheets shows a near-mechanical relationship: 3M for amortising senior term loans (quarterly covenant testing), 1M for revolving credit facilities and working capital lines (monthly drawdown cycles), 6M for property and real estate financing (annual lease/income cycles). These are not negotiation outputs — they are operational defaults that banks apply without thinking. When you push back on tenor, you are pushing back on a default, not a considered choice.

3. Asset-liability matching. Banks fund themselves across a mix of durations. If treasury has locked in 3-month funding at current rates, they will prefer to lend at 3-month EURIBOR so that funding cost and loan rate move together. This is the standard internal justification, and it is real, but it is rarely the deciding factor at the deal level.

4. Rate outlook. Banks have a view. If they expect rates to fall, shorter tenors protect their hedge costs. If they expect rates to rise, longer tenors let you bear the repricing risk for an extra quarter or two. This factor shows up in syndicated deals where multi-lender competition creates pressure to offer a differentiated tenor.

5. The vagueness option. Sometimes term sheets simply say “EURIBOR + margin” with no tenor specified. This is not an oversight. The bank is keeping its options open. From your perspective, this is worth pushing back on: ask them to specify the tenor. Any bank that refuses should explain why.

Fixed Rate vs. EURIBOR: When Does Each Make Sense?

EURIBOR-linked loans are not the only option. Belgian banks also offer fixed-rate loans — a single interest rate that does not change for the life of the facility.

With a fixed rate, you know exactly what your debt service will be every month for five, seven, or ten years. This makes covenant compliance easier to model and financial planning more predictable. The cost of that certainty: fixed rates are almost always higher than a variable rate at the time of signing.

There is also the prepayment dimension. Fixed-rate loans in Belgium carry the wederbeleggingsvergoeding (the reinvestment fee), capped at six months of interest. If you repay early on a fixed-rate loan when rates have fallen significantly, that fee can be substantial. Variable loans typically have a lower or no prepayment penalty.

The practical rule: if your cash flow needs certainty more than it needs optimisation, fixed is usually right. If you have enough cash cushion to absorb rate volatility and believe rates will trend down, variable with a short tenor gives you upside. Acquisition financing, where every euro of cash flow is modelled to service debt, generally favours fixed.

What to Check on Your Term Sheet

When you see EURIBOR on a term sheet, four things are worth confirming:

1. Which tenor is specified, and when does it reset? If it just says “EURIBOR + margin” with no tenor, ask. This should be a number: 1M, 3M, 6M, or 12M. The reset frequency will match the tenor (3M EURIBOR resets every ~90 days), but confirm the exact reset date in the schedule. That date is when your rate changes, and it must align with your cash flow planning.

2. What day count convention applies? Most Belgian business loans use ACT/360 (actual calendar days divided by 360). This means you are effectively paying slightly more than the stated rate — ACT/360 on a 3.00% loan is closer to 3.04% on an annualised basis. Occasionally you will see ACT/365 (slightly lower effective cost). The convention is rarely negotiable but worth knowing when comparing offers.

3. Is the floor above 0%? A 0% EURIBOR floor is now standard on virtually every Belgian variable-rate business loan — assume it is there. What you are actually checking is whether the floor is above 0%. Anything higher is aggressive and warrants pushback. You should also note the asymmetry: the floor gives the bank downside protection if EURIBOR goes negative, but there is almost never an equivalent cap protecting you from extreme rate spikes. The bank limits their losses; your upside exposure is uncapped. Our red flags guide covers aggressive floor clauses in detail.

4. Is the margin fixed for the term? Almost always yes. But occasionally term sheets include margin ratchets: the margin moves based on your financial performance. This can cut either way — see our negotiation guide for how to handle them.

The Real Rate You Are Paying

The rate on your term sheet is not the rate you actually pay.

Your loan likely has a dossier fee, an annual management fee, and potentially other costs. On a €500,000 loan at 3-month EURIBOR + 1.80% (total ~3.80%) over 5 years, with a 1% dossier fee and a 0.25% annual management fee, the true APR is closer to 4.5% — not 3.8%. The gap widens as the loan term shortens.

This matters for comparison shopping. Bank A at EURIBOR + 1.80% with a 1% dossier fee may be more expensive than Bank B at EURIBOR + 2.00% with no fees. You need to calculate the total cost, fees included, over the life of the loan.

There is one more thing worth saying directly: banks do not calculate your margin from their cost of funds upward and arrive at a number. In practice, margins are set by what the market will bear for your risk profile — calibrated against competing offers and prevailing rates for similar deals. This is why no bank in our dataset of 63 Belgian and European term sheets explains their margin formula anywhere in the document. The margin is a market outcome, not a calculation result. The only way to know whether your margin is fair is to compare it against other live offers and actual benchmark data for your deal type. That is exactly what the calculator below allows you to do.

Understanding what your margin actually means (how it is determined, what range is typical for your deal profile, and how to negotiate it) is the subject of our next guide. Understanding Your Loan Margin: What It Means and Whether You Are Paying Too Much picks up exactly where this article ends: once you understand the EURIBOR component, the next question is whether the bank priced your margin fairly. For Belgian SME term loans, that question has a concrete answer — if you have the right benchmark data.

Frequently Asked Questions