Setting up a backyard or countertop compost system has upfront costs, but it can reduce trash bills and produce nutrient-rich fertilizer for gardens. This calculator tallies those benefits to show how quickly your investment pays for itself.
The payback period in months is simply the equipment cost divided by the combined monthly savings :
where is the sum of avoided waste disposal fees and the value of compost you would otherwise buy.
Check your municipal garbage fees to see if composting can reduce your service level. Many cities offer discounts for smaller trash bins. Gardeners also save by using finished compost instead of store-bought soil amendments. Input those monthly values above to gauge total savings.
If a tumbling composter costs $120 and you save $5 per month on trash plus $10 per month on fertilizer, the payback time is months.
Composting cuts greenhouse gas emissions from landfills and enriches soil structure. It can also reduce water usage in gardens by improving moisture retention. These benefits don’t appear directly in the ROI calculation but add to the overall value.
Use this tool to see how quickly your compost setup can pay for itself. Even small monthly savings add up, and the environmental perks make composting a rewarding habit.
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