If the budget is fixed, put at least half of it into the grinder — and for espresso, arguably more.
Why
Grind uniformity determines extraction evenness. A grinder producing a wide spread of particle sizes gives you fines that over-extract and boulders that under-extract, in the same cup.
That tastes harsh and sour at once, and no machine setting fixes it.
What a good grinder buys you
Repeatability. The same setting gives the same grind tomorrow.
Fine adjustment. Espresso needs small steps; a grinder with coarse detents cannot land on the right setting at all.
Low retention, so today’s dose is not mixed with yesterday’s.
What a good machine buys you
Temperature stability and steam power. Both matter, and both matter less than grind.
An entry machine with excellent grind makes good espresso. A superb machine with poor grind does not.
The split
Espresso: 50/50 at minimum, and 60/40 towards the grinder is defensible.
Filter only: the machine matters less still. A hand grinder plus a V60 outperforms an expensive filter machine with pre-ground coffee.
The upgrade path
Buy the grinder you want and the machine you can afford. Machines are easier to upgrade later, and a good grinder serves every brew method you will ever own.
The exception
If you drink milk drinks and your machine cannot steam, that is a real limitation. Steam power is the one machine feature worth prioritising.
Last reviewed 8 August 2026