Tax year end has just passed. You've collected your bonuses, your ISA allowance has reset, and everything feels like a fresh start. But here's what most people miss: they're sitting on bank accounts earning barely any interest while better accounts are right there.
This is the moment in May when most people make their biggest mistake. They've got their bonus in an old account, they've switched once, and they stop there. Meanwhile, they're leaving hundreds of pounds on the table in pure interest—the kind that just sits there earning, month after month, regardless of whether you've triggered a bonus.
Let me show you what's actually available in May 2025 and how to build a proper earning stack that doesn't rely entirely on bonuses.
The May Interest Rate Reality
After April 5, something subtle but important shifts. Your ISA allowance resets, yes. But more importantly for everyday accounts, the interest landscape actually changes. Banks refresh their rates, some accounts tier their interest differently, and the competition for deposits heats up slightly.
In May 2025, here's what you're actually looking at:
Current accounts paying genuine interest:
- Some of the newer accounts from January-April are still paying respectable rates on balances (typically 4-5% on smaller amounts, depending on conditions)
- Regular saver accounts have reset their cycles, so any you opened in April are now earning through May-October
- The accounts that paid welcome bonuses in January through April are now in their "ongoing interest" phase
The crucial bit: these ongoing interest rates are not zero. But they're not advertised loudly, and most people don't realise they're still earning. They assume the bonus was the whole game.
It's not.
Why Your Tax Year Reset Actually Matters for Interest
Here's the mechanics bit, because it genuinely affects your strategy in May.
On April 5, your savings year resets. This means:
ISA reset: You have a fresh £20,000 allowance. Tax-free interest for the full year.
Savings allowance reset: Your personal savings allowance (£1,000 for basic rate taxpayers) resets, so you get another year of interest tax-free.
Regular saver cycles: Most regular saver accounts complete their March-April cycles and open new ones for May-October. You can now open new regular savers.
What this means practically: if you opened a regular saver in April, it just started its earning cycle. You've got 6 months ahead. If you opened one in October-November, it likely just completed and stopped earning meaningfully.
In May, the smart move is moving money that was in your "old" tax year accounts (where you've used up your savings allowance) into fresh accounts that reset everything. You get interest that counts against your new allowance, which means it doesn't eat into your tax relief.
Building Your May Interest Stack
This is where people get a bit confused, so let's make it concrete.
You don't need just a bonus account. You need layered earnings:
Layer 1: A strong current account with ongoing interest
Look for accounts paying 4-5% on balances up to £1,000-3,000. Even at the lower rate on anything above, it's still beating inflation. Keep your main spending money here. Check live offers page for which current accounts pay interest in May.
Layer 2: A regular saver (or two)
Regular savers are the overlooked ones. Yes, you saw posts about them in April, but May is when they actually start paying. If you haven't opened one, open one now. You get 6 months of guaranteed growth. Even at 6-7% APR (which compounds across the account, not just one payment), over £500/month that's £180-210 in interest alone over the cycle.
Layer 3: Stoozing (if you're disciplined)
If you've got a 0% card sorted, the interest-on-stoozing game is still alive. Put money on the card, deposit it in a savings account earning 4-5%, and pocket the difference. In May, with summer holidays coming, you might want to skip this if you can't trust yourself, but it's available if you're organised.
Layer 4: A savings account
This is background money. Fixed-rate savings if rates have stabilised, or easy-access if you want flexibility. Even 4-4.5% is better than the 0.5% the big names offer on their standard savings.
The genius of this stack: none of it depends on bonuses. You build it once, and it just earns. Every single month through to March 2026, this money is working.
A Real May 2025 Example
Let's make this concrete. Imagine you're a couple with about £15,000 you want to deploy across savings and banking.
Account 1 (Partner A - Current Account): £3,000 in an account paying 4% on balance. That's £10/month just sitting there.
Account 2 (Partner B - Current Account): £3,000 in a different account paying 4.5% (maybe a newer one). That's £11.25/month.
Regular Saver A: £500/month × 6 months = £3,000 total. At 6.5% APR, you're looking at roughly £97 in interest over the cycle.
Regular Saver B: £500/month × 6 months = £3,000 total. Same rate, another £97.
Easy-access savings: Remaining £3,000 in an account paying 4.2%. That's roughly £126 over the year (£10.50/month).
The total without a single bonus: roughly £300-350 in pure interest between May and October, just from having the right accounts.
Now add bank switch bonuses on top of this. If you switch each account once and get say £150 per switch, you've added £600. Combined interest and bonuses: £900-950 in earnings just from being organised.
That's a proper system.
Your May Timeline
Here's what actually needs to happen in May if you want this to work:
Week 1 (May 1-5): Assess what you've got. Which accounts paid welcome bonuses? Which are now in the post-bonus phase? Write it down. Check what they're earning now.
Week 2 (May 6-12): Open regular savers (if you haven't already) and start the first payment. If you've got a partner, open theirs too. This locks in 6 months of guaranteed growth.
Week 3 (May 13-19): Check current account interest rates. Is yours in the top tier, or are you earning peanuts? If the latter, plan your next switch. Check live offers page for May offers.
Week 4 (May 20-31): If switching, do it now. This gives your new account time to settle before summer holidays and means the switch completes in June, leaving July available for another potential switch.
June onwards: Let the system run. Your regular savers are compounding, your current accounts are earning interest, and you're positioned for another switch in July if you want to.
The key: you're not chasing bonuses frantically. You're building a system that earns whether there's a bonus or not.
Common Questions
Should I close my old current account once I switch?
Not immediately. Let it sit for at least a month after switching. Make sure all direct debits and standing orders have moved. Once you're confident, then close it. If it was earning interest, you'll miss that interest on the remaining balance, so time your closure to minimise that loss.
Can I open multiple regular savers with the same bank?
Sometimes yes, sometimes no. It depends on the bank's terms. Most allow one per person. Some allow multiple if they're different products (e.g., one regular saver and one linked savings account). Check the small print or ask the bank.
What counts as "interest" that uses my personal savings allowance?
Interest on savings accounts, regular savers, notice accounts, fixed-rate bonds—all of it. Interest on current accounts counts too. Only interest in ISAs doesn't count (that's the whole point of an ISA).
Is it worth switching accounts just for £10-15/month interest?
On its own, probably not (the faff isn't worth it). But combined with a bonus? Absolutely. If you're switching for a £150 bonus anyway, you might as well choose an account paying 4.5% interest instead of 0.5%. That extra 4% compounds over the months.
How do I track all this without going mad?
Honestly: a spreadsheet. One column per account, note the balance, the interest rate, the monthly earning, and the next action date. Spend 10 minutes a month updating it. It's the difference between earning £900 and earning £300, so it pays for itself immediately.