A floating-rate annuity loan is replayed through the real Euribor history since January 1999. Four reset periods are compared — 1, 3, 6 and 12 months: how much you would pay in total and how the monthly payment would swing.
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This is what the past did, not a forecast. Rates are shifted by historical changes, so a scenario keeps the shape of a real stretch of history but starts from today's level; the 0% floor and your reset period apply as set above, while the voluntary extra payment below is deliberately left out — this card is about rate risk alone. Not financial advice.
How the payment would change after each reset.
Euribor on the reset date + margin. Steps are reset moments.
Interest paid to the bank, running total.
Value on the first business day of each month, 01.1999 — 09.2026. Click the chart to set the loan issue date.
Milestones behind the big moves. Click a row to set the loan issue date to that month.
What is computed. The loan is issued in the selected month; the rate is fixed at issue and then every 1/3/6/12 months from the same-tenor Euribor. At every reset the annuity payment is recalculated from the remaining balance and remaining term — exactly how banks do it. Monthly interest = balance × annual rate ⁄ 12.
Data. Euribor on the first business day of each month, source — euribor-rates.eu, 333 months (01.1999 — 09.2026). January 2001 is missing on the source site and was interpolated between December 2000 and February 2001. A real bank fixes the rate on its own contract day, not strictly on the 1st — so results differ from an actual contract by tens of euros, not thousands.
What is not included. Arrangement fees, insurance, fees for changing the reset period, early repayments, and the fact that banks may quote different margins for different reset periods. This is an all-else-equal comparison. Not financial advice.
Euribor is the rate at which European banks lend to each other. Estonian home loans are tied to it: the contract rate is Euribor plus the bank margin. The margin is agreed when the loan is signed and stays fixed for the whole term — only the Euribor part moves.
And it does not move every time a new number appears in the news. The fixing period — 1, 3, 6 or 12 months — sets how often the rate is reset. With six-month Euribor, the rate fixed today stays put for half a year, whatever the market does in between.
What one percentage point actually costs in euros, and when that change reaches your payment, is worked through in a separate article: how Euribor moves your monthly loan payment, with a table and worked examples.
| Period | Euribor | Rate with 2% margin | Payment on €200,000 / 30 yrs |
|---|---|---|---|
| 1 month | 2.226% | 4.226% | €981 |
| 3 months | 2.608% | 4.608% | €1,026 |
| 6 months | 2.779% | 4.779% | €1,047 |
| 12 months | 3.029% | 5.029% | €1,077 |
The table shows the value on the first business day of each month. History covers 01.1999 — 09.2026, that is 333 months, and the data refreshes automatically on the 5th of every month.
An example: a €200,000 loan over 30 years with a 2% margin. At today’s rates that is €981 a month on one-month Euribor and €1,077 on twelve-month — a difference of €96 a month. That holds as long as rates stay where they are today; from here they can move either way.
Across the calculator’s history, one-month Euribor comes out cheapest in total cost for almost every starting month. The reason is simple: a longer period prices in an expectation about the future and is usually dearer. What you pay for the short period is uncertainty — the payment is reset every month.
A longer period buys calm: the payment is known half a year or a year ahead. The trade cuts both ways. When rates rise, the rise reaches you later; when they fall, the relief is late too.
The calculator runs the same loan through real history on all four periods. Set the amount, the term and the margin, then look at what would have happened had the loan been taken out in any month since 1999.
Banks often offer a firm rate for a few years. It is insurance paid for up front: the fixed offer is normally higher than today’s Euribor plus margin. Fixing pays off only if the floating rate averages higher than the offer. The “What if” tab works out what rate would make the deal fair.
The decision is not only financial. If a couple of hundred euros more per month would break the budget, certainty is worth something on its own.