Cash ISA vs Regular Savings Account: Which Is Better in 2026?

Basic rate taxpayers (20%) get a £1,000 Personal Savings Allowance — meaning the first £1,000 of interest earned outside an ISA each year is tax-free. Higher rate taxpayers (40%) only get £500. Additional rate taxpayers get nothing. At 4.5% interest, you'd need £22,222 in savings to breach the basic rate PSA. If your savings exceed this, a Cash ISA starts saving you real money.

In 2026, top easy-access Cash ISA rates are sitting around 4.5-5%. Top regular savings accounts often pay slightly more — 5-6% — but with restrictions: maximum monthly deposits, bonus rates that drop after 12 months, or limits on withdrawals. Compare like for like: what rate do you actually get on the amount you plan to save, for the duration you'll save it, after tax?

Cash ISA is better if: you're a higher or additional rate taxpayer, you already have substantial savings above the PSA threshold, you want flexible access without worrying about tax, or you're building toward a large long-term pot where compound tax-free growth matters. Regular savings account is better if: you have under £22,000 saved, you want a short-term bonus rate, or you're a basic rate taxpayer with limited savings. SYM's goal-tracking feature helps you model both scenarios based on your actual savings amount.