The Annuality Principle: Why Public Budgets Have an Expiry Date
Germany's federal government plans and approves its budget annually. Under Section 4 of the Federal Budget Code (Bundeshaushaltsordnung, BHO), the budget year corresponds to the calendar year, running from 1 January to 31 December. The Federal Ministry of Finance may set a different period for individual areas, but in practice 31 December remains the relevant cutoff for the vast majority of budget lines.
What happens to approved funds at year-end is governed by Section 45 BHO, which ties spending to its stated purpose and to the budget year. Funds may only be used for the purpose named in the budget plan, and generally only until the end of the budget year. For transferable expenditures, agencies can form so-called carried-over remainders that stay available until the end of the second following budget year, but using them typically requires the consent of the Federal Ministry of Finance and is bound to narrow conditions. For most budget lines, the practical rule is simple: not spent by 31 December means lost.
This mechanism is exactly what generates the time pressure regularly observed in the last quarter of the year. A contracting authority that has not fully committed its budget for a measure loses the corresponding funds if they are not awarded or spent in time. That explains why tender notices, award decisions and fund drawdowns can cluster in the weeks before year-end, without this necessarily reflecting any higher underlying demand.
The 'December Fever': An Observed Pattern, Not a Proven Law
The informal term December fever has become established for this clustering of year-end spending in public administration. How real and how large the effect actually is remains a matter of debate among researchers. In the journal Wirtschaftsdienst (issue 8, 2022), Christoph Siemroth and Gunnar Schwarting published a documented reply-and-rejoinder exchange that lays out two different explanatory models.
- Siemroth's explanation: the decisive driver is a use-it-or-lose-it incentive. Because unused funds lapse, it is rational for administrative units to spend them just before year-end. As a remedy, he proposes simpler carry-forward rules for unused funds into the following year.
- Schwarting's counter-position: the real cause lies in the budgeting process itself. When future budget allocations are anchored to the prior year's figures (incrementalism), fully drawing down assigned funds is rational for a department seeking to avoid future cuts. He argues for needs-based budgeting and strict controlling rather than relying on carry-forward rules alone.
- Common ground: both authors treat the time-bound nature of public funds as the structural driver of the pattern, but they disagree on the most effective countermeasure, and neither provides hard figures on the actual scale of the effect in this exchange.
For you as a vendor, this means: the legal mechanism that creates the pressure is well documented. Whether it actually translates into more contract awards in any given December cannot be inferred from that alone. Sound planning therefore relies on the mechanism itself (deadlines, budget commitments, published procurement calendars of the relevant authority), not on a blanket December rule of thumb.
What This Means for Your Sales Process
In practice, the annuality principle mainly means one thing for B2B vendors selling into public procurement: the final weeks before year-end are, for many contracting authorities, a period of heightened internal time pressure, not necessarily a period with more tenders per se. Bid evaluations, contract signings and fund drawdowns can concentrate in this window because case officers need to close out their files before the cutoff. For your sales team, that translates into a predictable but unevenly distributed workload: more parallel deadlines and decisions packed into a short stretch, not necessarily more total volume.
Companies that treat public tenders as a standing sales channel benefit from spotting this seasonal concentration before the first deadlines are already running. Continuous monitoring throughout the year, such as Cernavio's cernaTender module provides, ensures relevant procedures surface regardless of whether they are published in February or December, so your team is not caught off guard by several overlapping deadlines in the fourth quarter.
Practical Steps for the Year-End Window
- 1Check published procurement calendars and plans of the authorities relevant to you, where available, instead of relying on a general December assumption.
- 2Deliberately plan bid evaluation and proposal capacity for November and December, not only once the first deadlines are already running.
- 3Do not push your own submissions to the last possible day: contracting authorities are also under time pressure in this window, which can slow down queries and processing.
- 4Keep monitoring at a consistent level year-round rather than ramping it up seasonally, since the scale of the year-end clustering is not uniformly evidenced in the literature.
What is documented is the legal mechanism: under Sections 4 and 45 of the Federal Budget Code, the budget year matches the calendar year, and unspent funds generally lapse at year-end. That pressure can lead to a clustering of award decisions and fund drawdowns near year-end. How strong and how widespread this effect actually is remains disputed in the literature, a 2022 debate in Wirtschaftsdienst presents competing explanations without a unified empirical figure.
Deliberately plan processing capacity for November and December, check published procurement calendars of the authorities relevant to you, and avoid submitting your own documents at the last possible moment. Continuous, year-round monitoring is more useful than a short seasonal push.
It describes the fact that public budgets are planned and approved annually. Under Section 4 BHO, the budget year matches the calendar year. Under Section 45 BHO, spending is tied to its purpose and to the budget year and generally lapses at year-end unless one of the narrowly defined exceptions applies.
Carried-over remainders (Ausgabereste) are unspent but transferable funds that, under Section 45(2) to (4) BHO, can remain available under certain conditions until the end of the second following budget year. Creating and using them typically requires the consent of the Federal Ministry of Finance and is bound to narrow conditions, they are the exception, not the rule.