How the ECB sets interest rates — and how a decision reaches your mortgage

When headlines say "the ECB raised rates" or "the ECB cut," one committee has made one decision: the Governing Council — the six-member Executive Board plus the governors of the euro-area national central banks — has moved the ECB's policy rates. It meets to decide monetary policy roughly every six weeks, and its goal is fixed by mandate: keep euro-area inflation at 2% over the medium term, measured by the HICP.

The three rates, and the one that matters most

The ECB operates three policy rates. The deposit facility rate is what banks earn on money parked overnight at the central bank. The main refinancing rate is what banks pay to borrow from the ECB for a week against collateral. The marginal lending rate is the more expensive overnight borrowing window. In the current operating environment, banks hold abundant reserves, so the floor — the deposit facility rate — is the rate that actually steers money-market pricing. When you read "the ECB's key rate," that is the one to watch, and it is the headline number on this site's ECB page.

What the decision is based on

The Governing Council is data-dependent rather than pre-committed: each decision leans on the latest inflation readings and their breakdown, wage growth, bank-lending conditions, and the quarterly staff macroeconomic projections. Because policy acts with a lag of one to two years, the Council is always aiming at where inflation is heading, not where it stands — which is why markets react to guidance about future meetings at least as much as to the decision itself.

The transmission chain

A policy change reaches the real economy in steps, each slower than the last. Overnight money-market rates move within days — the €STR tracks the policy floor almost mechanically. Bank funding costs follow, and banks reprice what they offer customers: rates on new mortgages and business loans shift over the following weeks and months. Longer-term market rates, like 10-year government bond yields, move on expectations — they often shift before the ECB acts, simply because investors anticipate the path of future decisions. Last come prices themselves: the effect of a rate change on inflation builds gradually and peaks only after a year or more.

Why mortgage rates do not equal the policy rate

A mortgage rate is the policy environment plus everything on top: the bank's own funding cost, credit risk, competition in the national banking market, and whether the loan is fixed or floating. These layers differ sharply between euro-area countries — which is why the same deposit facility rate coexists with visibly different average mortgage rates across member states. Floating-rate markets pass policy changes through in months; countries where long fixes dominate feel them far more slowly, and mostly through new loans rather than existing ones.

What "restrictive" and "neutral" mean

Commentary about the ECB constantly grades its stance. The reference point is the neutral rate: the unobservable level that neither stimulates nor restrains the economy. Policy above it is restrictive — designed to slow demand and pull inflation down; policy below it is accommodative. Because neutral cannot be measured directly, the Governing Council's judgement about it is itself a moving part of every decision, and a frequent source of disagreement between forecasters.

Reading a decision like the market does

Three things decide how a meeting lands: the rate move itself, the guidance about coming meetings, and any change to the pace at which the ECB shrinks its bond holdings. A "hawkish cut" — lowering rates while warning against expecting more — can push market rates up. The chart to watch is not the past but the priced-in path of future policy, which moves with every data release between meetings.