Savers have until Saturday (5 April) to use their £5,760 cash Isa allowance for this tax year. Top easy-access deals include Nationwide Easy Isa at 1.6% and Metro Bank at 1.65%.
Santander also pays 1.6% - but only for the first year you are in the account. Nationwide pays a higher 1.75% on its Flexclusive Isa, open to some of its current account holders.
On fixed-rate deals you can earn 2% with Halifax for 18 months or 2.05% for two years. Santander and Nationwide also pay 2.05% for two years.
On taxable easy-access accounts the best rate comes from AA and Tesco Bank internet-based accounts, at 1.3% before tax (1.04% after tax); but both accounts include a bonus which is only payable for the first year you are in them.
Yorkshire, Leeds and Newcastle building societies all pay 1.25% (1%) with no bonus boosting the initial rates.
You can earn slightly more if you are willing to limit the number of times you take money out of the account each year. Britannia, part of Co-op Bank, pays 1.5% (1.2%) but limits you to four withdrawals a year.
The top one-year fixed rate comes from Britannia at 1.71% (1.37%), followed by Metro Bank at 1.75% (1.36%). For two years you can earn 2.1% (1.68%) with Shawbrook Bank and State Bank of India, or 2.05% (1.64%) with Britannia.
This article was written for our sister website Money Observer