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How to start an ecommerce side hustle

Written by: Mettle editorial
4 min read

We’ve put together some handy tips on tax, marketing tools and how to research a business plan when it comes to starting an e-commerce side hustle

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Online shopping is getting more and more popular. According to The Office for National Statistics (ONS) in January 2022, online sales made up 25% of all retail sales. Before the pandemic, in February 2020 it only made up 19.8% of all retail sales, showing steady growth.

According to Shopify, worldwide retail ecommerce sales reached nearly $5 trillion in 2021! With this in mind, if you've got an idea for an ecommerce side hustle – this could be the time to get started. All across Britain the self-starter movement is gaining momentum, more and more people are taking the leap and turning their passion project into income. 

In this blog, we offer some tips on how to start your own ecommerce side hustle. 

Check your employment contract 

Before you get stuck into starting your side hustle, you need to check your employment contract. 

While many businesses may not have a policy that prevents you from starting something on the side, it's always best to check. You want to make sure you don’t land into any hot water – or potentially lose your full-time job – if your contract says you aren’t allowed to start another business. 

It’s better to be safe than sorry. Even if there’s no clause in your contract about starting a business, it’s best to make sure your side hustle doesn’t affect your full-time job. 

Getting started 

Once that is sorted, it’s time to get started with making your side hustle a reality! 

First, you’ll need to plan and research your business idea. There are loads of different areas you can start a side hustle in – from teaching or coaching and selling homemade items to affiliate marketing. Speak to friends and family to bounce ideas around, or join a Facebook group with other side hustlers. You can find some ideas and inspiration here

Now comes the fun part – finding a name. This is a chance for you to get creative but you'll want to make sure the name you pick represents your brand in the right way. Make sure to do some research into what other businesses in your space are doing and are called so that you can set yourself apart. This is also a great time to make sure no one else has the same name as you. 

Once you’ve done that, you can get onto writing a business plan. This is a good chance for you to document your approach, how you’ll position it and understand your competitors more. You can find information on how to tackle your plan here

Online marketplaces

When it comes to running your ecommerce side hustle, you might need some digital tools to help you plan, manage and bring your passion to market. 

Online marketplaces are a good place to start and there are a few that could help you. 

Startups.co.uk did extensive research into the best ecommerce platforms for small businesses and found that Wix.com comes out on top. The analysis shows that it’s a great all-rounder platform. Though there is a cost for ecommerce and business plans. Prices start at £13 a month for the basic plan and go up to £22 a month. 

Second, on the list was Shopify because of its powerful selling tools. You can get a 14-day free trial before it goes up to £24 a month. 

Finance and social media tools

When running your ecommerce store, there are some other tools you might need to help manage your finances, keep track of your projects and help to schedule and analyse your social media. 

A lot of tools will either have a free option or offer a free trial. It’s always great to test something out before you put any money behind it. 

For your finances, platforms like FreeAgent allow you to get a full picture of both your historical income and potential future profits – all on a handy dashboard. 

There are also additional features like invoicing and a built-in time-tracking tool to capture every second that you work on a project, which can then be transferred to an invoice if you need to bill clients. If you’re a Mettle customer, you can get access to FreeAgent*.

Social media is a great way to market your ecommerce store and keep your customers (both existing and new) up to date with what’s happening. There are several social tools out there to try like Buffer (which has both free and paid plans). 

It allows you to publish to multiple channels through its Chrome extension or the Buffer software. Not only can you schedule posts across your social channels, but you can also see the analytics behind posts and how you’re engaging with your audience. 

Understanding tax

So you have an idea, and you’re getting started with your ecommerce side hustle. But what about tax? 

When it comes to tax for your side hustle it all depends on how much you’re earning. Everyone has a £1,000 tax-free trading allowance, so you don’t need to tell HMRC about any income if it’s less than that in one tax year.

If you are likely to go over that, you need to register for a Self Assessment tax return. Check out this handy guide from Elaine Calrk, founder of Cheap Accounting. 

Starting your own ecommerce story might seem daunting at first but with some passion, planning and commitment you can turn your dreams into reality.


*To get FreeAgent for included, all you have to do is make at least one transaction a month from your Mettle account. If you don’t make one transaction a month, or if your Mettle account is closed and you continue to use FreeAgent then the FreeAgent fees will apply.

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At Mettle, our aim is to give everyone the financial confidence to work for themselves, and that’s no different with our content. We want to give small business owners, freelancers and sole traders the tips, tricks and industry updates they need to run their businesses. 

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