One side hustle as an extra source of income might be easy to manage, but adding a second or even third can make everything more complicated. Trying to juggle everything from the day-to-day grind to tax planning can soon feel overwhelming.

“The complexity increases quickly as income sources multiply,” said Veronica Karas, CFP, principal at CAPTRUST. “The key difference isn’t just reporting requirements — it’s the level of planning needed to manage tax obligations efficiently.”

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Here are some tips people with more than one side hustle can follow to stay on the right side of the IRS.

Mixing personal spending with business earnings can create confusion even with only one income source. Add in multiple side gigs, and recordkeeping can get particularly messy.

Dedicated accounts for each income stream can be helpful, but keeping business earnings separate from personal spending is the most important thing, even if it’s one account for multiple side gigs. It keeps everything clean and easier to document if the IRS has questions.

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A missing 1099 doesn’t mean that income is invisible. It still counts, and the IRS has various methods of detecting under-reported income, including data from the entity making the payment.

This applies whether the income comes through apps, bank transfers, cash or crypto.

Tracking expenses often gets put to the bottom of the to-do list, especially when there are multiple side hustles on the go, but it can be a costly mistake.

Having organized tracking and documentation is that it makes side hustlers less likely to leave money on the table. “Many people underclaim legitimate deductions simply because they didn’t keep records throughout the year,” Karas said.

Unlike a traditional W-2 job, side hustle income doesn’t come with automatic withholding, which shifts the responsibility entirely onto the earner.

Karas recommended setting aside 25% to 35% of income for taxes as a good starting point. From there, estimated quarterly payments can help avoid penalties. Failing to keep up with tax payments is a common and costly mistake for side hustlers with multiple income streams.

As side income grows, taking a DIY approach to taxes might start costing more than it saves.

“If side hustles become meaningful income, it’s worth talking with a tax professional about estimated payments and retirement plan opportunities that can help reduce taxes,” Karas said.

Expert advice can transform tax strategy into a streamlined part of business growth, making it easier to manage multiple sources of income.

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This article originally appeared on GOBankingRates.com: Juggling Multiple Side Hustles? 5 Tips To Keep Your Income IRS-Friendly