Ask a dad with a spare room full of graded trading cards what he does in the evenings and you will often get a slightly guarded answer. Ask his relatives and you might hear a different one entirely. Toys. Messing about. Wasting money.
That gap, between what a hobby looks like from the sofa and what it looks like on a spreadsheet, is where a lot of fathers are quietly building something. Collectibles, sealed card boxes, retro consoles, trainers, vinyl, model kits. Plenty of it is bought to sell, priced carefully and held with a plan. And plenty of the dads doing it are fed up of being told they are playing.
Small businesses are the norm, not the exception
The idea that a one person operation from home is not a “real” business does not match the official picture. The government’s Business population estimates for 2025 put the number of UK private sector businesses at 5.7 million at the start of the year. Around three quarters of them, 4.3 million, did not employ anyone besides the owners.
Self employment is big too. The ONS Employment in the UK bulletin for October 2026 estimated 4.44 million people were self employed between June and August 2026, a little up on the same period a year earlier. The ONS does flag reliability issues with its Labour Force Survey, so treat the exact number with some caution, but the scale is not in doubt.
In other words, the bloke selling slabbed cards from the box room is not an oddity. He is in very large company.
Toys to some, stock to others
Take one dad who runs a collectibles business buying and selling graded cards. To friends and family, the cases on his shelves look like an expensive habit. To him, each one is stock. He has looked at condition, grade, rarity and past sale prices before buying, and he has a rough idea of when and why he would sell. That is not so different from any shop deciding what to put in the window.
The criticism tends to come from people who love him, which is exactly why it stings. And it usually sounds like concern rather than mockery: what if it all goes wrong, shouldn’t you be saving instead, isn’t this a bit childish at your age.
Those are fair questions to ask of any business. The problem is when the answer is decided before anyone has looked at the numbers, simply because the product happens to have cartoon characters on it.
The kitchen table classroom
The part many of these dads talk about most is not the profit. It is their kids. A child who sits next to a parent checking sold listings, comparing prices and deciding whether an offer is fair is getting a practical money lesson most of us never had.
Spotting value. Saying no to a bad deal. Understanding that something is only worth what someone will pay. Waiting rather than panic selling. None of it needs a textbook, and it tends to stick because it is attached to something the child actually cares about.
What dads weighing it up should check first
If a hobby is starting to look like a business, a few boring checks now can save a lot of grief later.
Know when it counts as trading. HMRC’s guidance on selling goods or services on a digital platform says that if you buy or make goods to sell at a profit, you are likely to be trading. Clearing out your own loft usually is not.
Mind the £1,000 line. Under the trading allowance, if your gross trading income in a tax year (6 April to 5 April) is £1,000 or less, you may not need to tell HMRC, though you still need to keep records. Above that, you need to register for Self Assessment. You can use the allowance or claim expenses, not both. HMRC has a checker for online platform income that walks you through it.
Expect the platform to report you. Since January 2024, selling platforms have had to report sellers to HMRC once they make 30 or more sales of goods in a calendar year or receive about €2,000 or more. GOV.UK is clear this does not automatically mean you owe tax, but it does mean HMRC will see the figures.
Read your employment contract. Acas explains that some contracts include clauses stopping you working elsewhere without consent, though these are banned for zero hours workers and those earning at or below the lower earnings limit. The Start Up Loans guidance on juggling a job and a start up also warns against using company phones or laptops for your own venture.
Know what funding exists. If it grows, the government backed Start Up Loan offers £500 to £25,000 as an unsecured personal loan at a fixed 7.5% a year, repayable over one to five years, with free mentoring. It is still debt, and you will need to pass a credit check.
Build it on the side first. Keep the day job while you prove there are buyers. Track every purchase and sale, including fees and postage, so you know whether you are making money or just moving it about.
Whose opinion counts
None of this means family doubts should be ignored outright. A partner asking about the household budget has every right to. But there is a difference between that and a relative at Christmas deciding a business is daft because it involves cards or consoles.
For dads in this position, the useful question is not whether the room approves. It is whether the thing is making life better for the people at home, and whether the numbers back it up. If they do, the eyebrows across the table matter a lot less.
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