ISAs and tax rules change more often than most of us can keep up with, and that’s exactly where they cost you money. Miss a Lifetime ISA bonus, misread your payslip, or ignore a fiscal drag threshold, and you could be handing over cash you didn’t need to. It’s rarely one big mistake that costs people the most, it’s a string of small ones that build up over years without anyone noticing.
We’ve pulled five Money Gains Podcast episodes that cut through the confusion. Sammie Ellard-King sits down with accountants, advisers and industry insiders who explain, in plain English, how ISAs actually work, where the UK tax system quietly catches people out, and what’s changing with the cash ISA rules from April 2027.
Whether you’re choosing between a cash and stocks and shares ISA, wondering if you’re due a Lifetime ISA bonus, or trying to work out why your payslip looks the way it does, there’s an episode here for you. No jargon, no scaremongering, just the facts and a clear steer on what to do next.
Between them, these five guests cover accountants, advisers and industry insiders who spend their working lives inside ISA rules and HMRC guidance, so you don’t have to.
Here are the five episodes worth your commute.
Timi Merriman-Johnson (Mr MoneyJar) on ISAs, Side Hustles and Personal Growth
Mr MoneyJar’s first appearance on the podcast is still one of the best ISA explainers we’ve recorded. Timi breaks down every type of ISA available in the UK, from cash to stocks and shares to Lifetime, and where each one fits depending on your goals and timeline. He also gets into index funds versus picking individual stocks, and how to maximise your ISA contributions without wrecking your monthly budget. It’s a genuinely useful primer if you’ve ever opened an ISA and then not known what to do next, and Timi’s own path into finance, via law and graphic design rather than a traditional City career, makes the whole conversation feel a lot less intimidating than most money content.
Brian Byrnes on the Lifetime ISA: How to Get £1,000 Free From the Government
Brian Byrnes, Head of Personal Finance at Moneybox, explains the most generous savings incentive most people never claim. Pay in up to £4,000 a year and the government adds a 25% bonus, up to £1,000 free, whether you’re saving for a first home or for retirement. Brian walks through choosing between the cash and stocks and shares versions, why financial confidence tends to track wealth, and how to track down pensions you’ve lost along the way, plus how pension tax relief stacks with your other savings. If you’re under 40 and haven’t opened a Lifetime ISA, start here: the £1,000 a year on offer is easy money that most people simply leave on the table.
Charlotte Baroukh Explains the UK Tax Traps Quietly Costing You Money
Chartered accountant Charlotte Baroukh unpicks the UK tax system in a way that actually makes sense. She covers how progressive tax bands really work (not the way most people think), the 60% tax trap that hits earners between £100,000 and £125,140, and how to read your payslip properly. There’s also a clear rundown of salary sacrifice, pension contributions as a tax tool, tax-efficient workplace schemes like cycle-to-work, and the £1,000 trading allowance for side hustle income. If tax has always felt like a black box, this episode opens it up, and Charlotte’s central point stays with you: once you understand how the bands actually work, most of the fear around tax disappears.
Rajan Lakhani (Plum) on the Cash ISA Reforms: Why Cutting the Allowance Won't Boost UK Investing
With cash ISA reform on the way, this is essential listening. From April 2027, the cash ISA allowance is being cut to £12,000 for under-65s, and a 22% charge will apply to cash interest earned inside non-cash ISAs. Rajan Lakhani from Plum explains why most Britons oppose the change and, more importantly, why cutting the allowance is unlikely to push more people into investing. He also covers the psychology of saving, why automation beats willpower, how to build an emergency fund before you think about investing at all, and the £450,000 Lifetime ISA property price cap that shuts London buyers out entirely.
Tom McNally: Why the UK Tax System Takes 80% of Your Money
Tom McNally, founder of Pie Tax, makes the case that once you stack income tax, National Insurance, VAT and other indirect taxes, the UK system can take a genuinely eye-watering share of what you earn. He unpacks why that matters for anyone weighing up a pay rise, a side hustle, or a property investment. He shares a real example of a Pie Tax user who reclaimed £50,000 in overpaid interest tax, explains the Laffer Curve in terms that actually apply to your own finances, and flags what Making Tax Digital means for anyone with side income from 2026. A sharp listen if you want to understand exactly where your money goes, and a useful nudge to check whether you’re due money back yourself.
Share this article with friends
Disclaimer: Content on this page is for informational purposes and does not constitute financial advice. Always do your own research before making a financially related decision.
