Expect roughly $20-30/month for entry-level managed hosting on a small store, rising to $100-300+/month as your traffic and catalogue grow.
You can find shared hosting for a few dollars a month, but for a store that’s usually a false economy. Slow, unreliable hosting costs you more in lost sales and downtime than it ever saves – especially during the traffic spikes (sales, campaigns) when every second and every uptime minute is worth the most.
The right way to budget: size hosting to your peak traffic, not your average, and treat it as revenue infrastructure rather than a cost to minimise. A store that stays fast and up during a sale pays for its hosting many times over.
Hosting is also only part of speed – the build matters too – but it sets the ceiling. More: best hosting for WooCommerce · total cost of a WooCommerce store