How to Start a Side Business While Working Full Time

Check your job contract before you start a side business while employed

Read your employment agreement and employee handbook for four things. A moonlighting or outside-work policy may require you to tell your manager. A non-compete or non-solicitation clause can bar work in the same field or with the same clients. An invention or IP assignment clause can give your employer rights to things you create, especially if you use company time, equipment or information. A conflict-of-interest policy covers selling to your employer's customers or suppliers.

• Never use work hours, work laptops or company software for the side business
• Pick a side business outside your employer's line of work if you can
• If a clause is unclear, ask HR in writing or have an employment lawyer read it

Budget your hours like a second job

Most people who stall did not run out of ideas; they ran out of evenings. Choose a weekly number you can keep for three months, not your best week. Then give each block a job, so you are not deciding what to do every time you sit down.

Batching is how working owners make this fit. Garcia-Hill Creations, a custom products shop run from a home workshop while one owner works full time, produces mostly on evenings and weekends and runs 10–20 small pieces in one batch to save setup time.

Set a money ceiling, or start with no money

Decide the most you will spend before the business pays you back, and write it down. If that number is close to zero, start with what you already own: sell a service built on a skill you have, take pre-orders and deposits before you buy materials, or use tools at a makerspace or library before buying your own.

• Service side businesses can start for the cost of a website or marketplace profile
• Product side businesses need materials, packaging and usually a tool or machine
• Keep the first purchase small enough that you could sell it on if the idea fails

Pick an idea that fits those limits

Start from what you can already do and what you already own, then look for a specific group of people with a problem you can solve. Check that people already pay for it: sold listings, local competitors and questions in groups you are part of are all signs of demand. Finally, run the numbers with the planner below. If an idea pays less per hour than a part-time job, change the price, the product or the idea. For a long list to choose from, see our side hustle ideas and craft business ideas.

Make a small first batch

Make 5–10 pieces, or offer a small fixed package if you sell a service. A small batch shows you real production time and material cost, gives you photos for listings, and limits what you lose if it does not sell. Eric Street started with one product for people he knew: glitter acrylic "badge buddies" for his nurse friends. They asked for more, he listed them on Etsy, and his shop has since sold over 7,000 items.

Price it so your hours are worth it

Add up materials and packaging, marketplace fees, and a value for your own time, then add profit on top. Side business owners often underprice because their time feels free. It is not: it is the scarcest thing you have.

Example: a cutting board with $10 in materials, about $4.70 in Etsy fees and 20 minutes of work at $30 an hour needs about $25 just to break even on your time. At $45 it leaves roughly $20 of profit on top.

To test your prices, use our profit margin calculator.

Choose where to sell first

Start with one channel that matches your product and your schedule. Add a second only when the first one is working.

Take good photos and write clear listings

Shoot in daylight against a plain background and show the item in use, the size and the personalization options. Write titles and descriptions with the words buyers search for, such as "personalized cutting board" or "custom dog tag", not clever names.

Find your first customers

Start with people who already trust you: friends, coworkers outside your employer's customers, local groups and communities you belong to. Ask your first buyers for a review and a photo. Then go where your niche gathers online and offline, and keep track of which source each order came from.

Choose a business structure: do you need an LLC?

In the US, if you sell on your own you are a sole proprietor by default, and you report profit on your personal tax return. An LLC adds a layer of protection between business debts and claims and your personal assets, but it costs a state filing fee and often an annual fee, and it does not change your income taxes by default. Many side businesses start as sole proprietors and form an LLC once they have steady sales, customers on their premises or products with liability risk. If you trade under a name other than your own, you may need to register a DBA ("doing business as"). An EIN is free from the IRS and lets you keep your Social Security number off business forms.

Get the licenses and permits that apply

Check three levels. Your city or county may require a general business license and, for a home-based business, a home occupation permit or zoning approval. Your state may require a seller's permit to collect sales tax on physical products. Marketplaces such as Etsy collect and remit sales tax for you in most states, but sales at markets and on your own website are usually your responsibility.

Understand how side business income is taxed

Side business profit is taxable income. On top of income tax, you generally owe self-employment tax of 15.3% (Social Security and Medicare) once your net earnings reach $400 in a year. Your employer does not withhold for the side business, so if you expect to owe $1,000 or more for the year you generally need to make quarterly estimated tax payments, or raise the withholding at your day job to cover it. Payment apps and marketplaces send a Form 1099-K once you pass $20,000 and 200 transactions in a year, but the income is taxable whether or not you receive one.

• Keep every receipt from day one
• Set aside a share of each sale for taxes in a separate account
• Ask a tax professional before your first filing season

Reduce taxable income the legitimate way

When you run your side business to make a profit, ordinary and necessary business expenses generally reduce your taxable profit. For a maker business that usually means materials, packaging, shipping, marketplace and payment fees, software, and equipment such as a laser or a printer. If part of your home is used regularly and only for the business, a home office deduction may apply. Records are what make these deductions stick.

Separate your money and protect yourself

Open a separate bank account and card for the side business, even as a sole proprietor, so bookkeeping and taxes take minutes instead of a weekend. Use simple bookkeeping software or a spreadsheet updated weekly. Ask your insurer whether your homeowner's or renter's policy covers business equipment and inventory; many do not. If you sell products people use, look into product liability coverage.

Buy back your time before you add more hours

When orders outgrow your evenings, look at where the hours go. Batch production, reusable design templates, saved settings and pre-cut stock all cut time per order. Outsourcing helps too: Ashton McClure, who works full time at a grocery store, works with three independent designers to turn customer ideas into design files, so her own hours go into making and finishing.

Invest in tools once demand is proven

A better tool is worth buying when it removes your bottleneck, not before. For product makers, a laser cutter or engraver is a common next step: it batches personalized pieces and opens up products like engraved cutting boards, layered signs and acrylic gifts. Ashton's cutting-board orders alone brought in more than $4,000 in her first four months, and her machine paid for itself within a year while she kept her job. If you are weighing a machine, compare options in our guide to the best laser cutter for small business, or read how to start a laser engraving business.

Turn your side hustle into a real business

The IRS treats an activity as a business when you run it to make a profit, not as a hobby. In practice that means keeping business records, working on it regularly, and changing what you do when something loses money. Formalize the rest as you grow: written policies for custom orders and returns, a simple brand, and a way to bring back past buyers.

Know when you are ready to go full time

Do not quit on one good month. A common test is that side income has covered your essential monthly costs for six months or more, you have several months of living expenses saved, and you have a plan for health insurance and retirement savings. Many owners take a step in between: fewer hours at the day job, or full time on the business during peak season.

• Six or more months of steady side income
• An emergency fund that covers your runway
• Health insurance and taxes planned for
• Demand that is still growing, not just a seasonal spike