Compost vs collection savings.

Composting diverts food waste from expensive bin collection. Commercial food waste disposal: 100-300/year per bin. Home composting: 30-100 setup, 0 ongoing. Community composting: 50-200 setup, minimal ongoing. The savings add up, plus you produce usable compost worth 0.30-1/kg if buying equivalent bagged compost.

10kg weekly food waste × 52 weeks = 520kg/year. Bin collection saved 200. Compost produced worth 520 × 0.50 = 260. Setup 100 amortized over 5 years = 20. Annual savings: 200 + 260 - 20 = 440. For a household generating 10kg/week of food waste, composting is clearly worth it financially and environmentally.

Council collections are shifting: many councils now offer separate food waste collection (free) but some charge for garden waste. Composting still wins because: you control the timeline (no waiting for collection), produce usable material, reduce bin smell, and avoid any future collection charge increases.

Run it with sensible defaults

Using weekly food waste of 10, bin collection cost annual of 200, compost setup cost of 100, compost value per kg of 0.5, the calculation works out to 440.00. Nudge the inputs toward your own situation and the output recalculates instantly. The defaults are meant as a starting point, not a recommendation.

The levers in this calculation

The inputs — Weekly Food Waste (kg), Bin Collection Cost Annual, Compost Setup Cost, and Compost Value per kg — do not pull with equal force. Two inputs usually tip the answer one way or the other. Identify which ones matter most by flipping each value past a round threshold and watching whether the winning option changes.

How the math works

Annual waste = weekly × 52. Compost value = waste × value/kg. Savings = bin cost + compost value - amortized setup. The working is transparent — you can verify every step yourself in the formula section below. No black box, no opaque "proprietary model".

Cost vs value in green choices

Sustainable options usually cost more upfront and less over time. This tool separates the two so the comparison is fair — looking at purchase price alone consistently makes the green option look worse than it is once lifetime costs are tallied.

What this doesn't capture

Carbon reduction, health benefits, and local air quality have real value the financial figure doesn't price. The calculation gives the money side honestly; for the full picture, note the non-financial benefits alongside.