If you’ve got more than one side hustle on the go, you’ve probably hit this problem: keeping track of what money’s coming in, what’s going out, and where it’s all going. It sounds simple at first—”Oh yeah, I’ll just jot it down somewhere”—but a few weeks in and suddenly you’re knee-deep in bank transfers, half-finished spreadsheets, and missing receipts.
I’ve been there. Back when I was flipping scrap gold, testing out stocks, and doing some weekend car detailing on the side, things got messy real quick. So, if you’re juggling a few different gigs—maybe mowing lawns during the day, food delivery at night, and reselling stuff online on weekends—this one’s for you.
Here’s how to track your income (and expenses) from multiple side hustles without pulling your hair out.
1. Keep Each Hustle Separate.
Why it matters:
If everything’s lumped together, it’s near impossible to know what’s actually working. Maybe you’re making good money walking dogs, but losing it all buying supplies for your candle business. If you don’t track it separately, you won’t know.
How to do it:
Bank accounts: If you can, open a separate bank account for each hustle—or at least one dedicated to “side hustle stuff.” It makes it way easier come tax time.
Color-coded spreadsheet: Keep one master sheet, but give each hustle its own color tab or section.
Use different apps or tags: Some apps let you tag income or expenses by category. If you’re using something like Wave or QuickBooks Self-Employed, it’s easy to split stuff out.
2. Choose a System That Matches Your Style.
Not everyone’s built for spreadsheets. That’s alright. You don’t need to be a bookkeeper—you just need a system that makes sense to you and that you’ll actually use.
Here are a few options:
- Notebook and pen: Old school, but still works. Just be consistent. I used to jot income and expenses into a $2 notebook I kept in the glovebox.
- Simple spreadsheet: Google Sheets is free and easy to share across devices. You can make a basic table with columns like: Date, Hustle, Income, Expense, Notes.
Apps:
- Wave – free, and good for invoicing and tracking income/expenses
- QuickBooks Self-Employed – popular with gig workers
- Notion or Airtable – good if you’re a bit more tech-minded
- Money Manager (App) – mobile-friendly if you prefer tracking on your phone
3. Log As You Go (Or at Least Weekly)
This one’s non-negotiable if you want your numbers to be useful. Don’t leave it for the end of the month—you’ll forget where the money came from, or what you spent on what.
Make it a habit:
- Add income the day you get paid.
- Track expenses the day you make the purchase.
Set a recurring reminder—maybe Sunday night after dinner—to update your sheet or app.
It doesn’t have to be perfect. Even rough tracking is better than none.
4. Use Simple Categories That Make Sense.
You don’t need to overthink this. Here’s what I use across my hustles:
- Date
- Hustle (e.g., Uber, Dog Walking, eBay)
- Description (brief note like “5km food delivery” or “sold tools on Marketplace”)
- Income
Expense
- Payment Method (Cash, EFT, PayPal, etc.)
- Notes (optional – like client name, receipt location)
- Keep it simple so you don’t start ignoring it. You can always get fancy later if needed.
5. Set Monthly Check-Ins.
Once a month, take 30 minutes to sit down and look at the numbers. What’s actually bringing in the money? What’s costing more than it’s worth?
Ask yourself:
- Which hustle paid off this month?
- What had high effort but low return?
- Are there any recurring costs you can cut (subscriptions, supplies, fuel)?
- Is this hustle worth continuing?
This little review helps you steer the ship. Otherwise, you’ll keep grinding away at something that’s barely breaking even.
6. Watch for Tax Time Traps.
Here in Australia (and pretty much everywhere else too), the taxman doesn’t care if you “forgot” about a side gig. If you earn income from it, it needs to be declared.
So:
- Keep all income records, even if it’s cash.
- Hang onto receipts for any business-related expenses (fuel, supplies, equipment).
- If you’re earning more than a few grand, talk to a tax agent. It’s worth the small fee.
- Track your kilometers if driving is part of the gig—it can be a legit deduction.
Don’t wait ‘til June to start sorting this. If you’ve been tracking all year, tax time’s a breeze.
7. Consider Using a Summary Dashboard.
Once you’ve got your tracking method sorted, a simple dashboard makes life easier. This could be a tab in your spreadsheet or a visual report from an app.
Key numbers to glance at:
- Total income this month
- Expenses this month
- Net profit (yep, the bit that’s actually yours)
- Hours worked (optional but handy)
Best performing hustle.
It helps you spot trends. Like maybe February was a killer month for tutoring, or car detailing tanked during winter.
8. Don’t Stress Over Perfection.
If you skip a few days or miss logging a sale, don’t beat yourself up. Tracking your side hustle income isn’t about being perfect—it’s about being better informed.
Even a 70% accurate system is better than flying blind.
Start small, get used to tracking, and tweak it as you go. You’ll save time, make smarter calls, and have a clearer picture of what’s working—and what’s not.
Quick Recap:
✅ Keep each hustle’s income and expenses separate
✅ Pick a system you’ll actually stick with
✅ Log income and expenses regularly
✅ Review your numbers once a month
✅ Keep receipts and track deductions for tax
✅ Use a simple dashboard for clarity
✅ Don’t let perfection stop you from starting
Final Word from Kim
Side hustling’s not just about working hard—it’s about working smart. If you’re making decent coin but losing half of it to bad habits or poor tracking, you’re spinning your wheels.
Get a grip on your numbers, and you’ll feel more in control—less stress, more freedom, and a better shot at turning one of your gigs into something long-term.
It doesn’t need to be flash. Just needs to work.
So grab a notebook, fire up a spreadsheet, or try one of those apps. Start today, and you’ll thank yourself in six months when your side hustle’s paying for the bills and the beers.
