The decisive sentence in a Zurich tender is no longer the one with the lowest number in it. On a procurement officer’s screen in the city’s finance department, a spreadsheet adds the purchase price of a thing — a fleet of vans, a building’s worth of concrete, a year of cleaning contracts — to the cost of running it, maintaining it, and disposing of it, and then sets that figure against the bidder’s environmental and social record. The cheapest offer, more often than not, loses. This is not a Zurich eccentricity. Since the start of 2021 it is, increasingly, Swiss law.
The shorthand inside the administration is Lebenszykluskosten — “life-cycle costs”, the whole bill a purchase generates from cradle to skip rather than the sticker price at the moment of signing. The idea is old. What is new is that Switzerland has rewritten its procurement statute around it, and that a handful of European city networks have spent two decades quietly borrowing the practice from each other long before the law caught up.
The law that changed the verb
For most of its modern history, Swiss public procurement ran on a single instinct: award the contract to the cheapest compliant bid. The revised federal procurement law — the Bundesgesetz über das öffentliche Beschaffungswesen, BöB, adopted by the Federal Assembly in June 2019 and in force since 1 January 2021 — replaced that instinct with a different test. Contracts now go to the vorteilhaftestes Angebot, the “most advantageous tender”, rather than the merely cheapest one. It is a small change in vocabulary and a large change in what a public authority is allowed, and expected, to value.
The revision was deliberately twinned. Federal bodies follow the BöB; the cantons and their municipalities follow a parallel instrument, the Interkantonale Vereinbarung über das öffentliche Beschaffungswesen (IVöB), the inter-cantonal procurement concordat, which the cantons adopted in November 2019 and which entered into force in mid-2021. The two texts were harmonised on purpose, so that a contractor bidding for federal work and the same contractor bidding for a cantonal road would meet the same rules. Under both, quality criteria — sustainability, innovation, life-cycle cost, the reliability and plausibility of a price — carry weight against price rather than behind it.
The IVöB is a concordat, which means each canton joins it on its own timetable by writing it into cantonal law. The Canton of Zurich’s version has applied since October 2023. That staggered rollout is the first honest qualification to any story about a Swiss “paradigm shift”: the principle is national, but the legal machinery that enforces it arrived canton by canton over several years.
A city that was already doing it
Zurich did not wait for the statute. The city has bound itself, by ballot, to the 2000-Watt-Gesellschaft — the “2000-watt society”, a target of cutting per-capita energy use to two kilowatts continuous and CO₂ to roughly one tonne a year. In 2008 Zurich became the first Swiss city to write that goal into its municipal constitution by referendum. A city that has promised its voters a long-run cut in energy and emissions cannot, in good conscience, keep buying the cheapest diesel van and the cheapest disposable everything. Procurement became one of the levers.
So the city built the apparatus. It now buys against published sustainability standards for whole categories — printed matter, paper, hygiene paper, textiles, food, vehicles, IT hardware, furniture, cleaning services and cleaning products — each with its own criteria. It employs a dedicated specialist for sustainable procurement and the circular economy. It has, by its own account, gone as far as recommending that public buildings be built in recycled concrete. The governing logic in all of it is the same life-cycle arithmetic the federal law now formalises: count what the thing costs to own, not just to acquire.
Where the template actually comes from
It is tempting to imagine a single Zurich tender document being photocopied across the continent. The truth is less cinematic and more interesting: the template is a shared one, and Zurich has been one of its co-authors rather than its sole proprietor. The city has participated since 2004 in Procura+, the European Sustainable Procurement Network coordinated by the local-government association ICLEI — a club of around forty-five public authorities from sixteen European countries that exists precisely so that procurers can copy each other’s clauses without reinventing them. In 2019 Zurich took a Procura+ Award for a sustainable-construction tender. The borrowing the brief imagined runs in every direction at once, through this network, and has for twenty years.
The hard part of whole-life costing has always been the maths, and here the documents are genuinely shared property. At federal level the KBOB — the coordinating conference of the public building and property agencies — publishes a harmonised method for calculating life-cycle costs in construction, written for the Confederation’s own building offices and the federal roads authority, ASTRA. The federal Energie-Vorbild programme built an Excel tool to put numbers on the life-cycle cost of something as mundane as a monitor or a heating system, following the ISO 20400 standard for sustainable procurement. At European level, Procura+ has run an interest group on life-cycle costing and helped develop a calculator for life-cycle cost and CO₂ emissions. A municipal procurer in Zurich, Lyon or Lisbon reaching for a whole-life-cost spreadsheet is, very often, reaching for a version of the same one.
The contract is awarded to the most advantageous tender — no longer simply to the cheapest.
Revised Bundesgesetz über das öffentliche Beschaffungswesen (BöB), in force 1 January 2021
Why a law does not change behaviour
This is the part the seed version of the story leaves out. A statute can change the verb — cheapest becomes most advantageous — without immediately changing what procurers actually do. Swiss construction-industry bodies have been blunt about it: years into the new law, a great many tenders are still, in practice, decided largely on price. The revised BöB deliberately leaves authorities discretion over how heavily to weight quality, and discretion is exactly the room in which old habits survive. The paradigm shifted on paper faster than it shifted on the procurement officer’s desk.
The reasons are familiar to anyone who has run a tender. A price is a single defensible number; a life-cycle cost is a forecast, full of assumptions about energy prices, maintenance intervals and disposal years away. Social and environmental effects are hard to convert into the same Swiss francs as the invoice. A losing bidder can appeal, and an authority that downgraded the cheapest offer must be able to show its working. The new law also gives authorities a sharper tool against suspiciously low bids — an offer roughly thirty per cent below the average of the others may be flagged as abnormally low and queried — but using even that requires the nerve to question a tempting number.
What spreads, and what does not
What travels between cities, then, is rarely one author’s document. It is a method and a set of tools — the life-cycle calculation, the category-by-category standards, the model award criteria — carried through networks like Procura+ and the Swiss interest group for sustainable public procurement, the IGÖB, of which Zurich is a founding member. Zurich’s contribution is less a single tender template than a demonstration that a large city can run on this logic for years without the lights going out, and can keep doing so across changes of administration. That is the thing other cities most want to see before they commit: not the clause, but the survival.
What does not spread so easily is the institutional patience underneath. Zurich’s sustainable-procurement record was recognised repeatedly by the development charity Solidar Suisse across the 2010s and into 2023, which is to say it is the product of a decade and more of slow administrative work rather than a single reform. A city can copy a spreadsheet in an afternoon. Copying the standing capacity to defend a more expensive winning bid — the specialists, the published standards, the political cover of a constitutional climate target — takes far longer, and is the part that does not fit in an attachment.
The number that wins
Back at the procurement officer’s screen, the change is quieter than the word “paradigm” suggests. The cheapest offer still appears, still sits there at the top of the price column, still has its advocates. What is different is that it now has to win an argument it used to win automatically — against a second column, harder to compile and easier to contest, that counts the years after the contract is signed. Switzerland has written that argument into law. Whether it is won, tender by tender, in Zurich and in the European cities reading over its shoulder, depends less on the statute than on whether the people running the spreadsheets are given the time, the tools and the cover to trust the second column over the first.
Sources: Bundesgesetz über das öffentliche Beschaffungswesen (BöB) and Verordnung (VöB), in force 1 January 2021; Interkantonale Vereinbarung über das öffentliche Beschaffungswesen (IVöB 2019), in force in the Canton of Zurich from October 2023; Stadt Zürich, Nachhaltige Beschaffung and 2000-Watt-Gesellschaft; KBOB Faktenblatt Lebenszykluskosten (2022); Bundesamt für Energie / Energie-Vorbild LCC tool and ISO 20400; IG nachhaltige öffentliche Beschaffung Schweiz (IGÖB); ICLEI Procura+ European Sustainable Procurement Network; Solidar Suisse procurement assessments; Schweizerischer Baumeisterverband commentary on the revised procurement law.
