The usual answer online is yes, very, followed by a claim that you can double your money on every charger. The markup on individual accessories can be high. That's true, and it's also why so many people open these shops and why so many close within a year.

Profit on an item and profit in a business are different things. Here is what sits between them.

Why it looks so good

Accessories are cheap to buy in bulk and sold one at a time to people who need them today. Someone whose charger has just died isn't going to compare five shops. Compared with selling phones themselves, where the profit on each sale is a thin slice of a big price, accessories give you a much bigger slice of a small price.

They also don't expire, take up little space, and don't need a fridge or a generator. All of that is real.

What eats the profit

Dead stock. This is the big one. Cases and screen protectors are made for specific models, and models change every year. A hundred cases for a phone people have stopped buying are worth close to nothing. Every accessories seller has a carton of them.

Fakes and returns. Low-grade chargers and cables fail quickly. Either you replace them and lose the item, or you refuse and lose the customer. Selling better quality costs more upfront and saves this.

Slow rent, fast fashion. Your rent is the same whether the month was good or bad. Many small items need to be sold before a shop covers its costs.

Small things go missing. Earbuds and memory cards fit in a pocket. In a shop with open displays and more than one attendant, the count rarely matches unless somebody is checking.

Price pressure. If you are in a phone market, the next shop sells the same cable. If you're in a neighbourhood, there are fewer customers.

Work it out for your own shop

Here is the sum, with invented figures for a small shop. Change every number to your own.

Per month
Sales₦900,000
Cost of the goods sold, including transport₦630,000
Gross profit₦270,000
Rent (yearly rent divided by 12)₦40,000
Attendant's salary₦50,000
Electricity, fuel and data₦15,000
Market trips and other costs₦20,000
Left over₦145,000

That ₦145,000 isn't yet profit. Two things still have to come out of it.

The first is your own pay. If you work in the shop full time, your time has a price.

The second is stock that won't sell. Suppose you bought ₦80,000 of cases this quarter that are now for an old model and will go for ₦20,000 if you're lucky. That is ₦60,000 lost, or ₦20,000 a month. The example shop is really making about ₦125,000 before the owner is paid.

Notice what the gross profit is here: ₦270,000 on ₦900,000 of sales, which is 30%. The owner of this shop may well be adding 40 to 50% to most items and telling people so. Both things are true. The difference between what you add to cost and what you keep from sales is explained in markup vs margin.

What the profitable ones do differently

They buy narrow and reorder often. A little of each item, restocked weekly, beats a deep pile bought once. It keeps cash moving and limits what can go dead.

They know what sells. Chargers, cables, power banks, earphones and protectors for the most common phones are needed every day by everyone. Unusual gadgets look good on the shelf and sit there.

They track models. Before buying cases or protectors, they check which phones are actually selling around them now, not last year.

They clear slow stock early. A case that hasn't sold in 60 days gets discounted or bundled with a protector while the model is still in use. See slow-moving stock: what to do with goods that won't sell.

They count. A weekly count of the small, costly items against a stock record book takes fifteen minutes in a shop this size.

They add services. Fitting a screen protector, setting up a new phone or doing a small repair earns money without any stock at all.

Before you put money in

Spend a week finding out three things.

What is the rent, for how long upfront, for the spot you want? What do the nearest sellers charge for the ten commonest items, and what would those items cost you landed? And how many people pass that spot in a day who might need a charger?

Put those into the table above. If the bottom line still looks worth your time after you've paid yourself and allowed for some dead stock, it's a real business. If it only works when every item sells at full price, it isn't yet.

Then start small, write down every sale from the first day in a daily sales record book, and let a month of your own figures tell you what to buy next.