You're seven weeks from the tax year reset. If you've been running a serious banking strategy since April 2024, you probably have multiple current accounts open, a handful of credit cards, money scattered across savings accounts, and absolutely no idea whether you've actually made decent money from it all.
This is the perfect time for a financial audit—not the boring, soul-destroying kind, but the practical kind where you actually see the numbers and realise what worked, what didn't, and what you can squeeze out before April 5.
Why February Is Audit Month
January was chaos. Everyone was switching, everyone was stressed, everyone was juggling cooling-off periods. By February, you've had a month to breathe. Your New Year rush bonuses have hit. You know what your stoozing looks like. You can finally see the pattern.
But here's the problem: most people never actually calculate their earnings. They know bonuses came in. They've spotted interest landing. But when someone asks "how much did you actually make?", they shrug and say "dunno, probably £500?" when it's actually £847.
By the end of this tax year, you need to know your real number. Not to brag (though it's nice), but because you need to decide how to spend your final seven weeks and plan your strategy for 2025-26.
The Three Income Streams You Need to Track
Your banking stack generates money in three distinct ways. If you're only tracking one, you're missing the picture.
Bank Switching Bonuses
This is the obvious one. Every time you switch, you get a bonus. Easy.
But here's what people mess up:
- They forget about switches that haven't completed yet (the money's coming, you just haven't received it)
- They switch via uSwitch or MSE but don't realise they've actually earned the bonus even if it arrives after April 5 (what matters for tax is the date you switched, not the date you received the money)
- They're unsure which bonuses are taxable (spoiler: they're not—it's trading credit, not income)
Go through your current account portfolio and add up every bonus you've received or will receive by April 5. If you switched in January, you should be receiving money by late February. If you switched in early February, expect it by late March or early April.
The historic market showed bonuses ranging from £100 to £175 depending on the bank and offer. Check the live offers page for what's currently available.
Savings Account Interest
This is where people catastrophically undercalculate.
Most savings accounts pay interest monthly. If you've had £5,000 in a savings account earning 4% for a full 12 months, that's £200. But people often think "oh, 4% isn't much" and completely ignore it.
Here's the thing: 4% on £5,000 is better than the tax-free interest allowance for basic-rate taxpayers (£1,000). If you've positioned £5,000 in a high-interest savings account instead of your current account at 0%, you've made a real gain.
Track interest separately. Most apps and online banking show you annual interest earned, or you can calculate: (balance × rate ÷ 100).
The trap: if you've had different balances throughout the year (because you were moving money around for switches), you need to either:
- Check your bank statement for actual interest received, or
- Calculate it month-by-month based on what was in the account when
Interest accrues daily, so if you put £5,000 in for three months at 4%, that's £50 gross interest.
Stoozing Returns
Stoozing is moving a 0% credit card balance to a savings account earning interest. You're borrowing at 0%, depositing at 4%, and pocketing the difference.
This one's harder to track because it involves two accounts, but it's also where serious money lives.
Example: £10,000 on a 0% card earning 4% in savings = £400 gross. Do this with two cards, you're at £800. Do this and you still have your regular savings account running, you might be nearing £1,200 before tax.
Track stoozing separately. Write down:
- Amount of credit card balance transferred
- Interest rate of the savings account
- Date transferred
- Date the 0% period ends (so you know when you need to move it)
Calculating Your True Total (And Accounting for Tax)
Here's the framework. It's not complex, just methodical.
Step 1: List All Bonuses
Go through your online banking for the last 11 months (April 2024 onwards) and list every bank switch bonus. These aren't taxed, so this is just a number.
Example:
- NatWest switch (April 2024): £125
- Barclays switch (July 2024): £100
- Halifax switch (November 2024): £150
- HSBC switch (January 2025): £150
- Total bonuses: £525
Step 2: Add Up Interest Earned
This is taxable (mostly). Add up all interest paid into your accounts since April 2024.
Example:
- High-interest savings: £180
- Current account interest: £45
- Cash ISA interest: £120
- Total interest: £345
For the interest, here's the tax bit: if you're a basic-rate taxpayer (earning £12,570–£50,270), you have a £1,000 personal savings allowance. This means the first £1,000 of interest is tax-free.
Since this example shows only £345, you've paid zero tax on it.
If you're a higher-rate taxpayer (£50,271+), your allowance is £500.
Step 3: Calculate Stoozing Gains
Stoozing interest is also taxable as savings interest (it goes into your £1,000 allowance for basic-rate taxpayers).
Example:
- £10,000 stoozing for 6 months at 4% = roughly £200
- Stoozing interest: £200
Step 4: Total It
Bonuses (£525) + Interest (£345) + Stoozing (£200) = £1,070 gross earnings
For tax: £345 + £200 = £545 of taxable interest. This is below the £1,000 allowance, so tax is £0.
Real take-home: £1,070
If you were a higher-rate taxpayer, the £545 over the £500 allowance would be taxed at 20%, so £9 tax owed.
The Calculation Errors Everyone Makes
Missing pending bonuses. You switched on January 28, but the bonus hasn't landed yet. Don't forget it—it's definitely coming by late March.
Forgetting ISA interest. Money in an ISA earns interest, but it's not taxable. It should still go in your "what did I earn" calculation, because you earned it. It just doesn't affect your tax liability.
Confusing the switching date with the bonus arrival date. Tax-wise, what matters is when you switched, not when you got paid. So a January 2025 switch counts in 2024-25, even if the bonus arrives in April.
Not accounting for fees. Premium accounts, fee-paying credit cards with annual charges—these cut into your earnings. If you paid £99 for an account fee, that's a real cost.
Assuming all interest is equal. It's not. A £100,000 balance at 1% beats a £1,000 balance at 4%. Make sure you're tracking the actual amounts in each account, not just the rates.
Forgetting that you've paid 20% tax on stoozing interest if you're a higher-rate taxpayer. If your interest exceeds your allowance, you owe tax. Don't pretend you didn't.
Your February-to-April Sprint
With seven weeks left, here's what to do with this audit.
If your earnings are lower than expected: You probably have time for 1–2 more switches (they complete in 7–10 days). Check the live offers page and switching guide for what's available. A £150 bonus in early March is within reach.
If your earnings are solid: Don't overthink it. Use the final weeks to lock in additional interest. Opening a new savings account now with a lump sum will earn interest for the remaining weeks of the tax year.
If you've maxed out your ISA: Good—the money's safe from tax. In April, reset for the new year.
If you've been lazily stoozing: Consider whether you've actually positioned your stoozing correctly. A 0% card earning 4% interest is solid. But if your card's 0% period ends in March and you've done nothing, you're about to start paying interest. Move that balance.
Building Your Audit Spreadsheet
You don't need anything fancy. A basic spreadsheet with columns for:
- Account name
- Type (current, savings, ISA, credit card)
- Opening date
- Balance (current)
- Interest rate
- Total interest earned this year
- Bonus (if applicable)
- Status (active, closing, pending)
This takes 20 minutes and gives you a complete snapshot. Then you can sort by earnings and see which accounts actually worked.
The secondary spreadsheet: track your switches month-by-month. This helps you plan for next year because you'll see your natural rhythm.
Common Questions
Does switching too many times in one year look bad for credit? No. Switching itself is a soft credit check (doesn't appear on your file). Opening new accounts is a hard check, but the impact is small and fades quickly. What matters is that you're not defaulting or missing payments. Strategic switching actually improves your credit by diversifying and managing credit properly.
Can I open new accounts in late March and still switch in time for April 5? Yes, but it's tight. The switch usually completes within 7–10 days, so you've got a window. However, don't rush it. A failed switch is worse than missing a bonus.
Is stoozing still worth it in 2025 if rates are falling? Yes, as long as the spread exists (0% minus the savings rate). At 0% borrowing and 4% savings, that's a 4% profit. Even at 1% savings, you're breaking even on risk. Rates have plateaued rather than collapsing, so the strategy still works.
How much of my interest do I owe tax on if I'm self-employed? Same rule: basic-rate taxpayer gets a £1,000 allowance, higher-rate gets £500. The difference is taxed as income. If you earned £345 in interest, you owe nothing (below the allowance). If you earned £1,500, you owe 20% on the £500 over your allowance (£100 tax).
Should I close accounts after I audit them? Not necessarily. If an account is earning interest or holding money efficiently, keep it. Close accounts that are costing you (fees) or doing nothing (0% interest, no bonus). Check the switching guide for the mechanics of account closure.
February is the month to get honest about your numbers. You've got seven weeks to tighten things up before the tax year resets. A 30-minute audit now means you start April 5 knowing exactly what worked and what to do differently next year.
The people who consistently make the most from banking aren't the ones blindly switching every month—they're the ones who measure, track, and adjust. That's you now.