The minimum investment to open any InvestEngine account is £100. Once you’ve put at least £100 into your InvestEngine account, you can add further one-off amounts or set up monthly investing by standing order or direct debit.
The minimum top-up by instant bank transfers, manual bank transfers or standing orders is just £0.01. There is a £50 minimum for direct debits.
You can invest as much as you want in a General Account.
You can only invest a maximum of £20,000 per tax year in an InvestEngine Stocks and Shares ISA but there is no limit on previous tax year ISA transfers.
See also: How do I add money to my portfolio?