The source of the pressure
The shock starts with energy.
The risks extend much further.
On 10 September, the ECB raised its key interest rates by 25 basis points. More significant than the decision itself is the economic backdrop against which it was taken.
The flash estimate showed euro area inflation accelerating from 2.9% to 3.3% in August. Energy prices rose 14.3% year on year, while inflation excluding energy and food stood at 2.4%. This gap illustrates why current price pressures cannot simply be attributed to overheating consumer demand. [1, 2]
Geopolitical conflict and energy supply risks are driving up input costs in an economy that is a net energy importer. Higher interest rates cannot restore shipping through the Strait of Hormuz or increase oil production.
25 basis points = 0.25 percentage points.
A move from 2.25% to 2.50% is not a 25% increase.
The energy shock in numbers
Euro area · August 2026 · Year-on-year price change
Source · Eurostat, flash estimate and the ECB. Figures are rates of price growth, not component contributions to headline inflation.
A central bank cannot directly eliminate an energy shock. It can, however, reduce the risk of that shock turning into more persistent inflation.
Inflation persistence
What matters is how the energy shock spreads.
- 1
Higher energy prices
The initial supply shock
- 2
Business costs and prices
Indirect pass-through to other prices
- 3
Wages and expectations
The risk of second-round effects
- 4
Persistent inflation
The shock can become embedded in price-setting
The ECB can act through demand, credit conditions and inflation expectations. This sequence is not automatic.
The initial shock
Interest rates cannot produce more oil.
When energy prices rise because supply is constrained, higher interest rates cannot directly address the cause. That does not mean a central bank can ignore the price increase. It must assess how long the shock will last and how far it will spread through the rest of the economy.
Indirect pass-through
Higher energy costs feed into goods and services prices.
Businesses may pass higher transport, production and operating costs on through their selling prices. The extent of that pass-through also depends on competition, profit margins and the strength of demand. Not every increase in input costs is passed on to customers in full.
Second-round effects
Wages and expectations enter the equation.
Workers may seek compensation for lost purchasing power. If households and businesses come to expect persistently higher inflation, they will factor it into wage agreements and price-setting. Wage growth alone does not imply a wage-price spiral. Productivity and the evolution of profit margins also matter.
The rationale for a policy response
A temporary shock can outlast its original cause.
Even after energy prices stabilise, pressures can persist in services prices and wages. The ECB therefore tightens financing conditions, restrains demand and seeks to maintain confidence that inflation will return to target. The concern extends beyond today's oil price to its influence on future price-setting.
What the outlook suggests
Energy prices may fall.
Price pressures may persist.
The ECB's September projections put core inflation at 2.5% in 2026, 2.6% in 2027 and 2.3% in 2028. The outlook therefore points to persistent price pressures beyond energy and food. [1]
The forecast is not evidence that an inflationary spiral is already under way. It does, however, explain why the ECB monitors domestic costs, wages and expectations alongside current oil prices.
Core inflation is slow to ease
ECB projections · September 2026 · Annual average, %
Source · ECB, 10 September 2026. The line connects annual averages and does not show monthly developments.
The ECB targets headline inflation over the medium term. Core inflation has no separate 2% target.
A stronger economy can mean higher rates.
Euro area real GDP growth projections · ECB
The euro area's resilience gives the ECB more scope to respond to inflation without an immediate sharp contraction in activity. For financial markets, stronger economic performance therefore need not signal earlier monetary easing.
With inflation above target, it may also weaken the case for rate cuts. Resilience is no guarantee, however, that the economy can absorb further tightening without economic costs.
Financing conditions
The ECB's impact extends
beyond a 2.50% policy rate.
The deposit facility rate anchors the cost of money. Its effects gradually feed through to borrowing, investment and public finances.
01 · Monetary policy
Rates and expectations
Both the current rate and the expected path of future policy decisions matter.
02 · Financial markets
Yields and the cost of capital
Investors reprice bonds and reassess their required returns.
03 · Credit
More expensive borrowing
Higher costs for new borrowing and refinancing.
04 · Real economy
Weaker demand
Some investment and consumption are deferred or forgone.
Bond markets can tighten conditions in advance.
The German 10-year government bond yield traded at around 3.5% following the decision. This yield is not simply a reflection of the ECB's deposit facility rate. It also incorporates expectations for future interest rates and inflation, as well as the term premium for holding longer-dated debt. Bond supply also affects yields. [3]
Governments, businesses and households can therefore face tighter financial conditions before the next policy meeting. Existing fixed-rate loans do not reprice immediately. Higher costs may only emerge when the fixed-rate period ends or the debt is refinanced.
Market level following the ECB decision, 10 September 2026
Illustrative example
What would another 25 basis points mean?
Potential deposit facility rates compared with 2.50%
If the full rate difference were passed through to the borrowing rate, annual interest costs would rise by the amount shown, assuming unchanged principal. This is neither a loan repayment calculation nor a forecast of lending rates. The pass-through from ECB rates to loan rates may be incomplete or delayed.
September's 25-basis-point increase does not operate in isolation. It adds to earlier policy moves, elevated energy costs and higher market yields. Their effects feed through to the economy gradually and with a lag.
How far can the ECB go?
2.75% or 3.00%?
The limit is economic, not just numerical.
The issue is not simply how many more rate increases lie ahead. It is how much additional restraint will help contain inflation, and at what point it will impose a disproportionate drag on growth.
The ECB must act before inflation becomes entrenched, even as the full effects of its earlier decisions have yet to emerge. Inflation risks are tilted to the upside, while growth risks are tilted to the downside. This imbalance complicates every subsequent policy meeting. [1]
If it tightens too little
Inflation could become entrenched.
Higher inflation expectations and persistent domestic cost pressures could delay the return to price stability. Restoring it later could require a stronger policy response.
If it tightens too much
Growth could weaken more than necessary.
A sharp retrenchment in investment and consumption could occur just as energy pressures are already easing. Policy lags increase the risk of overtightening.
What will determine the next move?
Neither the oil price alone nor a single headline inflation reading is sufficient. The ECB needs to assess whether the price shock is spreading through the domestic economy and how strongly higher financing costs are already restraining activity. It has not committed to a predetermined rate path.
The duration of the energy shock
Whether elevated energy prices subside or remain a persistent source of cost pressure.
Wages, services and expectations
Whether price pressures broaden and persist even without further increases in energy prices.
Credit and economic activity
How quickly tighter conditions feed through to consumption, investment and employment.
The two arguments connecting the story
The ECB is responding to the energy shock because its effects may persist. Yet there are limits to how far it can tighten. The same interest rate that restrains inflation also raises financing costs across the economy.
Sources and methodology
- ECB · Monetary policy decisions, 10 September 2026 ↗
Interest rates, effective date, inflation and growth projections, risks and the data-dependent approach to policy decisions. - Eurostat · August 2026 flash inflation estimate, 1 September 2026 ↗
Year-on-year headline, energy and core inflation. - Reuters · European bond yields following the ECB decision, 10 September 2026 ↗
Context for the German 10-year yield. A rounded figure, not a live market quote.
The data relate to the ECB's decision of 10 September 2026. Forecasts describe scenarios, not certain future outcomes. The diagrams illustrate possible economic mechanisms without estimating their magnitude or probability.