How To Escape 3 Beginner Side Gig Surprises That Shrink Profit
It's easy to get excited about earning money from a side job, but the truth is that your take-home pay can be surprisingly low for several reasons. Many newcomers to a side hustle ignore critical things that slowly eat into revenues, turning what should be a successful secondary pursuit into a lesson in financial planning.
“A lot of advice online focuses on ‘how to make money quickly,’ but hardly any talks about how much of that money you’ll actually keep,” said Abi Hill, CEO of Just Starting Out, an online UK platform that supports new business owners. “In the current cost-of-living climate, that distinction really matters.”
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The “official” 2026 tax season has ended and for side gig workers there were a lot of changes to their 2025 filings. If you plan on being one of the millions of Americans who start a side job this year, you’ll need to figure out your tax situation. But you’ll need to keep some other things in mind too.
Here are three side gig errors that can lower your take-home earnings.
Underestimating Side Gig Tax Obligations
Thresholds for several 1099 forms — for example, 1099-K, 1099-NEC and 1099-MISC — changed for side gig taxes in 2026. However, even if you aren’t sent a form, “You must file a tax return if you have net earnings from self-employment of $400 or more from gig work, even if it's a side job, part-time or temporary,” per the IRS.
“Taxes tend to be the biggest surprise since side hustle income isn’t subject to withholding,” said Mark Coffie, the CEO and chief revenue officer of Magical Butter, maker of botanical extractors. “That means self-employment taxes and quarterly estimated payments are possible, in addition to normal income tax.”
Amy Coats agrees. The founder of Accounting Atelier, a boutique bookkeeping firm, warned that it's on you to track your taxes or face an unpleasant surprise.
“[O]wing a large amount in April with no withholding can also trigger underpayment penalties on top of the bill," she said. “As a general rule of thumb, I tell clients to set aside at least 25% of their side gig earnings for taxes — that's a starting point, not an exact or blanket number, but it prevents the worst surprises."
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Mixing Business and Personal Finances
The IRS requires the reporting of cash income, app payments, freelance work, side gigs and online sales profits. Does any of that sound like “personal finance” paperwork to you? Me neither. However, you’d be amazed how many people fail to separate themselves from their side gig and how many brush off recordkeeping until the very last minute.
“Most beginners run their side gig income and expenses through their personal accounts and by tax time they can't substantiate the deductions they're entitled to,” Coats said. “Receipts are mixed in with personal spending, expenses get missed and a lot of legitimate write-offs disappear simply because the documentation isn't organized enough to support them.
“My recommendation is to open a separate bank account and use a separate credit card for the side gig from day one,” she added. “Even a basic spreadsheet alongside that separation will save hours of cleanup at tax time and a free or low-cost tool like QuickBooks makes it even easier.”
Apps, Platform Fees and Payment Processing Charges
Whether you’ve chosen to work outside or from home in an app-based side gig, you’ll have to deal with platforms and the sometimes-indiscriminate fees they command.
“Whether it’s marketplaces, booking platforms or payment processors, small percentages add up quickly,” Hill said. “We’ve seen cases where 25% of income is lost before the person even accounts for their own time.”
There are always hidden service charges, fast-payout costs and subscription fees that hide the true cost of doing side gig business. And don’t forget about out-of-pocket expenses, like hardware/software purchases, storage or upgrading your phone plan — they are often forgotten and add up quickly.
Getting caught by surprise isn’t fun, especially when it’s your livelihood at stake. It's not surprising that side jobs cost money; what's surprising is how many beginners are unprepared and don't keep track of these bills. If you're not surprised by what's left over after the expected costs, a side gig can still be rewarding and profitable.
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This article was provided by MoneyLion.com for informational purposes only and should not be construed as financial, legal or tax advice.
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