The third option: free with your account
In most cases your first card machine is free with the providers I work with. When that applies, the rent-or-buy question mostly goes away, and the thing to compare is the fees. See free card machines.
Short-term hire
If you only need card payments for an event or a busy season, short-term hire makes sense. Rapyd hires terminals from 3 days to 3 months with no long-term commitment. See Rapyd card machines.
How I'd decide
- Check whether a free machine is available on your account.
- If not, compare the total rental over the time you'll keep it with the purchase price.
- Check whether a bought machine would work if you ever switch provider.
- Look at what support you get if it breaks on a Saturday.
myPOS is the provider I use when a business wants to own its reader.