Germany's upgraded growth rests on spending the institutes say is off track

Germany's five leading economic institutes raised their growth forecasts on 24 September, but they did so with a warning about the government's budget. In their joint autumn forecast they expect GDP to grow 1.3 per cent in 2026 and 1.1 per cent in 2027, then only 0.4 per cent in 2028, and they say fiscal policy is expanding faster than the European fiscal framework envisages. The question is whether the spending packages that are lifting the economy now can be sustained once the lift fades.

An upgrade that is front-loaded

According to the joint forecast, published by the ifo Institute on behalf of RWI, ifo, IfW, IWH and DIW, the 2026 projection is 0.7 percentage points higher than in spring, and the 2027 projection 0.2 points higher. The institutes attribute the change to a stronger first half of 2026 than expected, with exports and manufacturing value added rising markedly. They expect the recovery to be supported from the fourth quarter by "robust foreign demand and rising public expenditure on defense and infrastructure".

The forecast is explicit that the base is narrow. High energy prices linked to the Iran war have weighed on activity, though the institutes say they have so far had little spillover to broader consumer prices. They project inflation of 2.8 per cent in 2026 and 3.2 per cent in 2027, and unemployment of 6.4 per cent in 2026 easing to 5.8 per cent by 2028. They also write that the labour force is shrinking because of demographic change and that potential growth continues to decline.

Forecasters do not fully agree on the path. In its own autumn forecast, published on 3 September, ifo projected 1.4 per cent growth in 2026, 1.2 per cent in 2027 and 0.8 per cent in 2028, with inflation of 3.0 per cent in 2027. The joint figure for 2028 is half of ifo's, which shows how much of the outlook beyond 2027 depends on assumptions about energy prices and fiscal policy rather than on observed data.

What the budget is doing

The federal cabinet approved the 2027 draft budget and a financial plan to 2030 on 6 July, and the Bundestag held its first debate on it on 8 September, according to the federal government. Reuters reported total spending of €555.4bn and total borrowing of €203.6bn for 2027, including about €54.9bn through the infrastructure fund and €30bn through the special defence fund. Core defence spending rises to over €109bn from €82.2bn in 2026. The government puts total investment at about €118bn, including €36bn from the infrastructure and climate-neutrality special fund.

Finance Minister Lars Klingbeil told the Bundestag, in the government's summary, that "the diggers are at work; bridges and tracks are being repaired." The government says it has closed a €34bn gap for 2027 through measures that include one per cent cuts across ministries, a two per cent staff-reduction target, a smaller Climate and Transformation Fund contribution and tax changes on crypto assets, plastics and tobacco.

Where the institutes and the government diverge

The institutes' fiscal reading is less comfortable. Their release states that growth in net primary expenditure is expected to "exceed significantly the path envisaged under the European fiscal framework", and that a growing need for consolidation exists even though the reformed national debt brake is respected. They forecast the general government deficit widening from 4.1 per cent of GDP in 2026 to 4.7 per cent in 2028. ifo's own forecast is slightly lower, at 4.6 per cent in 2028, with gross debt rising from 62.7 to 67.9 per cent of GDP.

Reuters' account of the budget points to the cost of this path: interest payments are projected to nearly double from €41.9bn in 2027 to €80.7bn in 2030, and a funding gap of roughly €109bn remains from 2028 onwards. Business groups quoted by Reuters warned that by 2030 "nearly one in five euros of tax revenue could be tied up in interest payments." These are budget-planning figures, not forecasts of outcome, and the government's description of the plan emphasises consolidation measures rather than the later gap.

The 2027 figures in the two documents are not directly comparable. The budget is a federal plan; the institutes forecast the whole general government, including states and municipalities and the special funds' effects, and use national-accounts definitions.

Industry: a recovery that has not yet reached output

Destatis data for June show why the manufacturing picture is mixed. New orders rose 3.1 per cent on the previous month, driven by machinery and equipment (+12.7 per cent) and computer, electronic and optical products (+22.7 per cent). Production rose only 0.2 per cent on the month, and, excluding energy and construction, fell 0.8 per cent on the year. The order book is filling faster than factories are producing, which is consistent with the institutes' view that public demand, not private investment, is carrying the upturn. This analysis uses June data; we did not find later Destatis figures in the sources consulted.

Ifo names energy-price volatility as the main risk. Its Timo Wollmershäuser said that "a massive energy price shock caused by the Middle East conflict is slowing down the economy" while "a highly expansionary fiscal policy is supporting growth."

What to watch

• Destatis' August orders and production releases, to see whether June's order surge turns into output.
• The Bundestag's budget deliberations on the 2027 draft, and whether the €109bn gap from 2028 is addressed with measures or deferred.
• Energy prices and Middle East supply news, which ifo identifies as the biggest risk to its inflation and growth path.
• The government's own autumn projection and any European Commission assessment of Germany's expenditure path against the EU fiscal rules.

The institutes' message is not that Germany's spending is misdirected but that its effect is temporary and its bill is not. A 2028 growth rate of 0.4 per cent, set against a deficit near 4.7 per cent of GDP, is the number that will test that judgement.

Sources

• ifo Institute — Joint Economic Forecast Autumn 2026: Recovery under structural stress
• ifo Institute — ifo Economic Forecast Autumn 2026: Recovery Forces Gain the Upper Hand
• Reuters via Yahoo Finance — German cabinet approves 2027 draft budget, hikes defence, investment spending
• Federal Government — Cabinet approves 2027 Federal budget
• Federal Government — Bundestag debates the 2027 federal budget
• Global Banking & Finance — German Economic Institutes Raise Growth Forecasts for 2026 and 2027
• Destatis — New orders in manufacturing in June 2026: +3.1% on the previous month
• Destatis — Production in June 2026: +0.2% on the previous month