Financial Literacy for Teen Founders — Revenue, Profit, Taxes

Your business made $4,000 last month. How much of that is actually yours?

If you can't answer that in under ten seconds, you're not running a business. You're running a hobby that happens to move money.

Most teen founders we meet can quote their revenue to the dollar. Ask about profit and the room gets quiet. Ask about taxes and you can hear the WiFi. This is normal — most adults skip this too. The difference is that most adults don't have a twenty-year runway to compound the advantage of learning it now.

Here's the core vocabulary. Revenue is money in. Profit is what's left after expenses. Taxes are what you owe on the profit. Cash flow is the timing of when that money actually hits your account versus when you owed it. These four words run every business on earth, from a lemonade stand to a trillion-dollar company.

Revenue is the easy one. You sold ten $40 digital products, you made $400 in revenue. Done. The trap is thinking revenue equals success. A company can do $10M in revenue and die because they were spending $11M to earn it. Revenue is a vanity number if it's the only number you track.

"Commingling funds is the fastest way to lose tax deductions and confuse yourself into bankruptcy."

Profit is where adults get tripped up. Profit equals revenue minus every cost it took to earn that revenue. The ad spend. The Stripe fee (2.9% plus thirty cents per transaction, by the way — learn that fee, it's eating your margin). The software subscriptions. The contractor who made your logo. The 1099 you paid your friend to edit a video. If you're running a service business, your profit also needs to subtract the hours you put in, because your time has a dollar value even when you don't pay yourself. Track every dollar out. Every single one. A Google Sheet with two tabs — income and expenses — is enough for your first $100K.

Taxes are the part nobody teaches and everybody panics about. In the US, if you make more than $400 in self-employment income in a year, you owe self-employment tax on top of income tax. That's roughly 15.3% for Social Security and Medicare plus whatever your income tax bracket is. Most teen founders end up owing between 20% and 30% of their profit to the IRS. If you're 16 and made $8,000 profit this year, set aside $2,000 right now and don't touch it. Open a separate savings account. Label it TAXES. Move a percentage of every single payment into it the moment it hits. This one habit will save you more stress than anything else in this post.

Quarterly estimated taxes are the other thing. If you expect to owe more than $1,000 in taxes for the year, the IRS wants you to pay in four chunks — April, June, September, and January. Miss them and you pay a small penalty. The IRS form is 1040-ES. Your parents may need to help you set this up the first time because you're under 18, but you should be the one who understands it. This is your business, not theirs.

Cash flow is the silent killer. You can be profitable on paper and still go broke. Imagine you sold a $5,000 project in January but the client pays net-60, meaning the money arrives in March. Meanwhile, rent on your Adobe subscription, your domain, your email tool, your AI tools — all due in January. You have a profitable business with empty pockets. Adults lose companies over this. The fix is brutal and simple: require deposits. Fifty percent upfront, fifty on delivery. Or charge monthly retainers instead of big one-off invoices. Or keep a float of one to three months of expenses in cash so timing mismatches don't kill you.

The metric that actually matters is profit margin. Profit divided by revenue. If you did $1,000 in revenue and $300 of it was profit, your margin is 30%. Service businesses can hit 40–60% if they're lean. Product businesses with physical inventory often sit at 15–25% because of cost of goods. Digital products and software can run 70%+ because the cost of selling the hundredth copy is basically zero. Know your margin. Optimize the margin, not the revenue.

One more thing adults skip — separate your money. Open a business bank account the second you legally can. Before that, use a dedicated personal account that only handles business cash. Never mix. Never buy personal stuff from the business account. Never deposit business money into the account you buy food from. Commingling funds is the fastest way to lose tax deductions and confuse yourself into bankruptcy.

Pick one number and track it weekly for the next 90 days — profit, not revenue — in a shared sheet you actually open every Sunday.

Next Gen is built for teens 13–19 — $79/mo early-seat pricing, lifetime capped at the first 50 teens.