Savings Certificates Calculator

In October 2026 the Série F base rate is 2.500%, the same figure already fixed in September. It is updated every month and tracks the 3-month Euribor, capped at 2.5%, and it has sat at that legal maximum for two months running: it cannot rise further even if Euribor does. In Série E the base rate is that same rate plus 1 percentage point, with its own 3.5% ceiling, so it is likewise at the maximum, 3.500%. On top of either comes the permanence premium for the years held, which is not subject to the cap. Check the month’s figure on the IGCP website and enter it in the calculator.

As a rule, no. Série E pays the same base rate plus 1 percentage point and has a higher permanence premium in the first five years, so it earns more than Série F under any comparable rate scenario. In this calculator, €10,000 in Série E over 10 years earns about €1,198 more net. And the decision is final: Série E closed to new subscriptions in June 2023, so anyone who redeems can only come back through Série F.

It depends on the month you subscribed, because the permanence premium runs from the data-valor. In October 2026 the Série E base rate is at its 3.500% ceiling; on top of that come 0.5 points between the 2nd and the 5th holding year and 1 point from the 6th to the 10th. A May 2019 subscription is in its 8th year and therefore earns 4.500% gross. Pick the month under “Subscribed in” and the calculator gives the holding year, the rate in force and the repayment date.

No, and that is deliberate. Each quarter earned the base rate in force at the start of that quarter, and those past rates have moved a great deal since 2017; deriving today’s balance from today’s rate would give a wrong figure. What the calculator gives exactly is the rate your subscription earns now and when it is repaid. For the redemption value of the holding itself, IGCP runs a simulator on AforroNet that uses your own account data.

Yes, in both series. Interest is capital income and is taxed at 28% (the flat withholding rate) at source. What compounds is the net interest, so the calculator shows the net value as the main result.

It is an add-on to the base rate that rises the longer you hold the certificates. In Série F it starts at +0.25% in year 2 and reaches +1.75% in years 14 and 15; in Série E it is +0.50% from year 2 to 5 and +1.00% from year 6 to 10. It rewards long-term saving and is not subject to the base-rate cap.

You can redeem from the first interest date, that is after the third month. You get back the capital, which is always guaranteed, plus the interest capitalised up to that date. What you give up are the permanence premiums of the later years, which are the product’s biggest advantage.

Yes. Each savings account can hold at most 250,000 Série F units (€250,000) and, counting Série F and Série E together, the combined ceiling is 500,000 units. The minimum subscription is 10 units. These ceilings can be changed by order of the government member responsible for Finance.