Washer-dryer vs separate machines: which is cheaper to own?
One machine that does both sounds cheaper and tidier — and for a small flat it can be. But the drying is where a combined unit quietly costs more, in energy and in lifespan. Here is the honest comparison.
- Drying is less efficient, so higher energy per dry over the years
- Smaller dry load than wash load, so bigger loads need splitting
- One machine doing two jobs tends to wear out sooner
- You cannot wash and dry at the same time
- A dedicated dryer (especially heat-pump) dries far more efficiently
- Full dry loads, and you can wash and dry at once
- Two simpler machines usually last longer than one combined unit
- Needs the space and the higher upfront outlay
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For a small home tight on space, a washer-dryer is the sensible lower true cost — one machine, one price, and the drying penalty is minor if you rarely tumble-dry. For a household that dries often, separate machines usually win over their lives: a dedicated (ideally heat-pump) dryer is far cheaper to run, both machines last longer, and you can wash and dry at once. Match it to your space and how much you actually dry.
Run a real option through the calculator for a sourced, dated, confidence-graded true total — every running cost above, counted, with no product ranked above another for money.
Common questions
Upfront yes — one machine instead of two. Over their lives it is often not, because a combined unit dries less efficiently and tends to wear out sooner. For frequent drying, separate machines usually win the true cost of ownership.
Adequately, but less efficiently and in smaller loads than a dedicated dryer, so the energy cost per dry is higher. If you tumble-dry often, that running cost is what tips separate machines ahead despite their higher purchase price.
When space is tight and you rarely tumble-dry — a small flat, a couple, light laundry. There the single machine and lower upfront cost outweigh the modest drying penalty, making it the lower true cost.
More cost-to-own comparisons, the hidden-fee comparisons, or the fee glossary.