Some things age well. A good single malt. A leather armchair. The bassline of a Hot Chocolate record. Other things just sit there gathering dust while the world races past – and a surprising number of those are buried in the UK tax system!
The Association of Taxation Technicians recently rounded up a collection of tax reliefs and allowances that have been frozen for so long, they’ve practically fossilised. For the average small business owner, that’s not a museum curiosity. It’s money quietly leaking out of your pocket, plus a growing pile of admin nobody asked for. So, pour yourself a coffee and let’s take a tour through the decades, because to understand how stale some of these limits are, you have to remember what the UK looked like when they were last touched.
The IHT relief that predates the iPhone, the internet, and quite a lot of your staff
Let’s start with the real antique. The inheritance tax allowance for wedding gifts hasn’t budged since 1975, back when Harold Wilson was Prime Minister, Margaret Thatcher had just seized the Conservative leadership, and the Bay City Rollers were screaming “Bye Bye Baby” to the top of the charts for six straight weeks. A parent could give their child £5,000 tax-free on their wedding day. They still can. Adjust that £5,000 for fifty years of inflation and it would be closer to £39,800 today – probably enough to pay for a wedding at today’s prices! The wedding may have got more expensive, but the allowance has not.
The annual gifting exemption is barely any younger. Frozen at £3,000 since 1981, the year Bucks Fizz won Eurovision by whipping their skirts off, it would now be worth around £11,800 if it had kept pace with inflation. The small gifts allowance of £250? Last touched in 1985, the year EastEnders first aired and Jennifer Rush’s “The Power of Love” became the year’s biggest seller. It should be nearer £795 by now. And, because these allowances have shrivelled, executors end up reaching for fiddlier reliefs like gifting “out of normal income” which means trawling through a deceased relative’s spending patterns. Not exactly how anyone wants to spend a grieving fortnight.
Then there’s the nil rate band – the slice of an estate passed on tax-free. It’s been pinned at £325,000 since April 2009 when Lady Gaga’s “Poker Face” was ruling the airwaves, and the freeze is set to run to 2031, by which point it will have stood still for 22 years. Inflation says it should be around £530,000. The result: more ordinary estates are quietly dragged into IHT every year.
VAT: a number from the Wayne’s World era
Here’s one that genuinely stings for trading businesses. The VAT “de minimis” limit (the threshold that lets businesses making both taxable and exempt supplies skip the notoriously horrible partial exemption calculations) has sat at £625 a month since the early 1990s. Picture 1992: John Major in Number 10, Britain crashing out of the ERM, Whitney Houston’s “I Will Always Love You” inescapable on every radio, and a mobile phone the size of a house brick. The limit hasn’t moved since.
Uprated for inflation, it would be roughly £16,250 a year rather than £7,500. Because it’s an all-or-nothing rule, going a single penny over tips you into one of the most error-prone corners of the entire VAT system and can cost a business up to £16,000 a year in irrecoverable VAT. Three decades of cost inflation have done the rest: more and more businesses are being pushed over a line that hasn’t shifted since the days of dial-up.
Working from home, priced in 2013 money
If your team works from home, two frozen allowances are quietly short-changing them. Employees can be reimbursed just £6 a week tax-free for additional household costs (set in April 2020 and untouched since), while the self-employed flat-rate homeworking allowance of £26 a month has been stuck since 2013 – the year Andy Murray finally won Wimbledon, and “Blurred Lines” was the song nobody could escape. Energy bills have since rocketed; research in June 2025 found that typical bills were 43% higher than just a few winters earlier. The allowances haven’t noticed.
The Christmas party trap
Every December, the £150-per-head staff party exemption catches employers out. It’s been £150 since April 2003, when Tony Blair was PM, the Black Eyed Peas were asking “Where Is the Love?”, and Concorde made its final flight. Inflation-adjusted, it should be about £280. The cruelty is in the design: it’s all-or-nothing allowance, so spending £151 makes the entire cost taxable, not just the extra pound. With many firms now spending up to £170 a head, that festive goodwill can come with a surprise tax bill in January.
While we’re here: the trivial benefits limit (the bottle of wine, the birthday voucher) has been £50 since the rules began in 2016, and the separate VAT gift threshold has been £50 since 2001 – a mismatch that catches out even diligent employers.
Savers and lodgers feeling the freeze too
The Personal Savings Allowance has been £1,000 (basic rate) since 2016, the year Drake’s “One Dance” spent the summer at number one. Back then, with the base rate at 0.5%, you’d have needed £200,000 in the bank to generate enough interest to hit it. By 2024, with rates far higher, around £19,000 would do it, pulling far more ordinary savers into tax. And rent-a-room relief, frozen at £7,500 since 2016, has lagged a 45% rise in average rents.
So, what’s a business owner to do?
You can’t unfreeze a government allowance from your desk. But you can stop these quirks from biting. Watch the all-or-nothing thresholds (e.g. the party allowance, the VAT de minimis threshold) like a hawk, because the penalty for one pound over is wildly out of proportion. Plan gifts and estates with the real (shrunken) allowances in mind. And budget for the fact that “tax-free” reimbursements increasingly don’t cover the actual cost.
The tax system was built for a Britain of brick-sized phones and Bay City Rollers. Until it catches up, knowing exactly where these traps lie is half the battle, and that’s precisely the kind of detail worth a conversation before, not after, you trip over it.
