Office waste audit: a weekend guide that pays for itself

Your waste contract is the only line in the office budget that nobody has ever opened. Electricity gets audited, paper gets benchmarked, even the coffee gets compared — but the bin contract renews quietly every year, priced for an office that throws away everything.

The fix is not a sustainability programme. It is a two-hour audit on a Friday afternoon, one phone call on Monday, and a calculator. Here is the whole procedure, with the real tariffs it should be measured against.

What a bin lift actually costs

Municipal operators in the EU publish their tariffs, which means you never have to guess what a lift should cost — only what yours does. Three published examples, all current:

• Berlin (BSR, municipal, fee schedule 2025/26): a 1,100-litre residual-waste bin on fortnightly service costs €164.23 per quarter — roughly €25 per lift. Weekly service doubles the fee. The 660-litre bin is €118.58 per quarter. The recyclables bin (Papier, packaging) is fee-free. A 240-litre bio bin is €13.50 per quarter.
• Dithmarschen district, Deutschland (AWD, commercial price list valid from 1 January 2026): commercial residual waste in a 1,100-litre bin runs €149 per month on weekly service, €102 fortnightly, €80 every four weeks — and an unscheduled extra lift costs €71. Paper collection in the same bin size starts at €13 per month.
• Dublin (Panda Recycling, pay-by-lift, January 2025): €13.50 per general-waste lift, €3.80 per organic lift, €1.25 per recycling lift, plus a €70 half-yearly service charge.

The pattern across all three: residual is expensive, recycling is cheap or free, and every organic item in the wrong bin is charged at the residual rate. Your contract may not look like these. That is exactly the point of the audit.

What your office actually throws away

Three independent datasets bracket the answer:

• Eurostat puts EU municipal waste at 517 kg per capita in 2024, with biowaste the single largest fraction of reported composition (28.8%), followed by paper and cardboard (13.9%) and plastic (7.5%). Office waste is counted in municipal waste in most member states.
• Cundall’s audits of UK offices (100–175 kg per person per year, average ~130 kg) gefunden over half the mass is paper and roughly 30% food.
• Great Forest compiled 100+ audits of commercial office buildings and found 77% of what offices send to landfill is recyclable: 34% organics, 23% Papier, 19% glass/metal/plastic, with only 23% genuine rubbish.

So a 50-person office at Cundall’s average generates about 6.5 tonnes a year, of which perhaps 1.5 tonnes is actual trash. The other five tonnes are paper, packaging and food paying residual-bin prices.

The coffee line is worth its own number. The Deutscher Kaffeeverband puts German consumption at 163 litres per person per year and recommends 7–10 g of grounds per cup. Conservatively — two cups a day, 220 working days, 8 g of grounds — a 50-person office produces roughly 180 kg of wet coffee grounds a year, every one of them currently landfilled inside a black bag, where they sit anaerobically and make methane.

The weekend protocol

Friday, 4:00 pm (90 Minuten). Collect every bin: under desks, Küche, print corner, reception. On a floor covered with cardboard, sort the contents of three representative bins into five piles — paper, packaging, food and grounds, general, drink containers. Weigh each pile with a luggage scale. That is your composition.

Friday, 5:30 pm (30 Minuten). Pull the last 12 months of waste invoices. Build one table: bin size × collection frequency × price per lift × annual cost. Note every surcharge — extra lifts, fuel levies, bin rental, “contamination fees”. The surcharge line is where renegotiation money usually hides.

Monday (one call). Two phone calls, actually. Call your current hauler with the composition table and ask for a re-quote with a smaller residual bin plus free paper/packaging collection and an organic service. Then call one competitor with the same table. Municipal tariffs above are your walk-away price.

Woche 2. Replace under-desk bins with a central sorting station — Great Forest measured recyclables in trash falling from 30% zu 7% after exactly this change. Add one bucket under the coffee machine.

Was du sparst

A 50-person office that sorts properly and re-prices its contract saves roughly €1,500–2,000 a year — about €35 per employee, Wiederkehrend.

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The arithmetic: 6.5 tonnes a year at a loose density of ~110 kg/m³ is about 59 m³, or ~54 lifts of a 1,100-litre bin. At a conservative blended residual rate of €35 per lift, the all-in-black-bin baseline is €1,890 a year. After the audit, paper and packaging go out free (BSR charges nothing for them), 1.5 tonnes of true trash needs only ~22 lifts (€770), und 1.8 tonnes of organics go to a bio service at ~€600. New total: ~€1,370.

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The honest caveat: the pure bin arithmetic saves ~€500. The bigger number comes from the contract — weekly service becomes fortnightly, the €71 extra-lift surcharges stop, and one competitor’s quote reprices the rest. A 25–30% cut on a five-figure haulage line is what the audit actually buys. That is the number to defend in the budget meeting.

Nothing here needs a consultant, a sensor or a campaign poster. It needs one Friday and the invoices nobody opened.

Methodik

Tariffs: BSR fee schedule 2025/26 (1,100 l residual €164.23/quarter fortnightly, weekly doubles, recyclables free, bio 240 l €13.50/quarter); AWD commercial price list from 01.01.2026 (1,100 l residual €149/month weekly, €71 per extra lift, paper from €13/month); Panda Dublin pay-by-lift, January 2025. Composition: Eurostat (517 kg/capita 2024; biowaste 28.8%, paper/cardboard 13.9%); Cundall audits via Positive Zero (~130 kg/person/year); Great Forest 100+ office audits (77% divertible). Coffee: Deutscher Kaffeeverband (163 l/person/year, 7–10 g per cup). Model: 50 × 130 kg = 6.5 t at ~110 kg/m³ ≈ 54 × 1,100 l lifts; residual €35/lift blended.

Quellen

• Berliner Stadtreinigung (BSR), Gebührenübersicht 2025/26: https://www.bsr.de/gebuehrenuebersicht
• Berliner Stadtreinigung (BSR), Abfallgebührensatzung 2025/26 (Amtsblatt Nr. 55): https://www.bsr.de/assets/downloads/abfallgebuehrensatzung.pdf
• Abfallwirtschaft Dithmarschen (AWD), Preisliste Gewerbekunden, gültig ab 01.01.2026: https://www.awd-online.de/fileadmin/media/PDF__s/01_AWD_Preisliste_Gewerbekunden_2026_ansicht.pdf
• Eurostat, Municipal waste statistics (517 kg per capita, 2024; composition 2023): https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Municipal_waste_statistics
• Positive Zero / Cundall, CO2e emissions due to office waste (office audit data): https://positivezero.com.au/s/IP-6-CO2e-emissions-due-to-office-waste.pdf
• Great Forest, Office Waste Management Optimized (100+ commercial office audits): https://greatforest.com/wp-content/uploads/2018/02/White-Paper-Office-Waste-Mgmt-Optimized.pdf
• Deutscher Kaffeeverband, Kaffeeland Deutschland facts (163 l per capita, 2024): https://kaffeeverband.de/de/presse/kaffeeland-deutschland-20-tag-des-kaffees-spannende-fakten-zum-lieblingsgetraenk
• Deutscher Kaffeeverband, Kaffeezubereitung — dosing 7–10 g per cup: https://www.kaffeeverband.de/de/kaffeewissen/kaffeezubereitung
• Dublin Live, Panda Recycling charge increases (per-lift prices, January 2025): https://www.dublinlive.ie/news/cost-living-ireland-thousands-bin-30879650

Nächstes Leck zu reparieren

The audit tells you what leaves the building; it does not tell you what arrives. Delivery packaging — the corrugate, film and polystyrene your suppliers drop off weekly — is the second half of the same tonnage, and unlike the bins, you can bill it back: a returns-and-reuse clause in the next supplier contract turns your receiving dock into the cheapest recycling stream you have. Das ist der nächste Artikel dieser Reihe: Abfall & Zirkularität.

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Carla Lavigne ist Green Ops Editor bei mycompanyisgreen.org und die Kollegin, die den Taschenrechner zur Prüfung bringt.