Your teen's first paycheck: the exact money plan every parent should teach
Most teenagers spend their first paycheck in a week. Not because they're irresponsible — because nobody handed them a plan. The good news: a first paycheck is one of the clearest teaching opportunities a parent will ever get. The money is real, the amount is meaningful to them, and the habits formed here tend to stick for life.
Here's the exact plan to walk through together, using a real $8,000 summer job as the example.
Step 1: Decode the pay stub first
Before spending a dollar, sit down with the actual pay stub. This is the most skipped step and the most valuable one. For most teens, the gap between what they expected and what they actually received is the first real introduction to how the tax system works.
| Pay Stub Line | What It Means | Example ($8,000 summer) |
|---|---|---|
| Gross Wages | What you actually earned | $8,000 |
| Social Security Tax (6.2%) | FICA — funds Social Security, taken from every paycheck | −$496 |
| Medicare Tax (1.45%) | FICA — funds Medicare, taken from every paycheck | −$116 |
| Federal Income Tax | Withholding based on W-4; may be refunded at filing | −$200 (estimate) |
| State Income Tax | Varies by state; some states have none | −$200 (estimate) |
| Net Pay (Take-Home) | What hits the bank account | ~$6,988 |
Two things to point out: FICA (Social Security + Medicare, combined 7.65%) comes out of every paycheck automatically and is non-negotiable. Federal and state income tax withholding is an estimate — if too much was withheld, the teen gets a refund when they file Form 1040 in the spring. If too little, they owe. Filing a return is simple for a first job, and it's worth doing together.
A teen who earns $8,000 with no other income will likely owe zero federal income tax after the standard deduction ($14,600 for single filers in 2026) — meaning any federal withholding they paid comes back as a refund. Make sure they file.
Step 2: The 50/20/20/10 split
Apply this to the gross amount so the Roth IRA contribution aligns with their actual earnings (which is what the IRS uses to determine eligibility):
- 50% — Spend freely ($4,000): This is theirs to use however they want. No tracking, no guilt. Autonomy over spending is part of the plan — restricting it too tightly just creates rebellion against the whole system.
- 20% — Short-term savings goal ($1,600): A specific target — a car, laptop, travel, first-month rent. This bucket has a name and a deadline, which makes it real.
- 20% — Roth IRA ($1,600): Invested in a broad index fund. Tax-free growth for up to 49 years. The most important dollar they'll ever invest.
- 10% — Give ($800): Their choice of where. Keeps the relationship with money from becoming purely self-directed.
Step 3: Open the Roth IRA (if it isn't already open)
A 17-year-old with earned income is eligible for a custodial Roth IRA. The parent opens it, the child is the beneficiary. They contribute up to the lesser of $7,500 or their earned income — in this case, $1,600 (20% of $8,000).
The $1,600 goes into a total market index fund (FZROX at Fidelity, or VTI at any broker). Then set a calendar reminder to contribute again next summer.
The verified math: Roth IRA balance at 25
Scenario: teen earns $8,000 each summer from age 17 to 24 (8 summers) and contributes $1,600/year to their Roth IRA. At 7% average annual return:
Using the future value of an annual annuity formula:
FV = PMT × [(1+r)^n − 1] / r
= $1,600 × [(1.07)^8 − 1] / 0.07
= $1,600 × [1.71820 − 1] / 0.07
= $1,600 × 0.71820 / 0.07
= $1,600 × 10.260
= $16,416
At age 25, after 8 years of contributing $1,600/year, the Roth IRA holds roughly $16,400. That may not sound enormous. But they've contributed only $12,800 of their own money — the rest is already compound growth. And this balance at 25, left entirely untouched until retirement at 65, grows to:
$16,400 × (1.07)^40 = $16,400 × 14.974 = $245,573 — tax-free
(Verification: (1.07)^40 = [(1.07)^20]^2 = [3.8697]^2 = 14.974)
From 8 summers of putting 20% of earnings into a Roth IRA, the teen arrives at 65 with nearly a quarter million dollars of tax-free retirement wealth — before contributing a single dollar after age 25.
Filing the first tax return
If the teen's only income is W-2 wages and their gross is under $14,600 (the 2026 standard deduction for a single filer), their federal taxable income is $0. They still need to file if any federal tax was withheld — because filing is how they get the refund.
The return is straightforward: Form 1040, plug in the W-2 numbers, take the standard deduction, done. Many tax software products offer free filing for simple returns. The first time takes an hour. Do it together. By the second year it takes 20 minutes and feels routine.
One critical note: if the teen's parents claim them as a dependent, they cannot take the full standard deduction on their own return — the dependent standard deduction rules apply (generally the greater of $1,350 or earned income + $450, up to the normal standard deduction). Tax software handles this automatically when they check the dependent box.
What financially unprepared teens do instead
Without a plan, the typical pattern looks like this: paycheck arrives, spend the bulk of it in the first two weeks, small savings drift into the checking account, no Roth IRA opened, no awareness that a $1,600 investment now is worth $245,000 at 65. At 25, they start from zero. They're not irresponsible — they just never had the conversation.
The 50/20/20/10 plan takes 30 minutes to introduce. It gives the teen autonomy over half their earnings (no resentment, no rebellion) while quietly building the habits that matter most. The Roth IRA contribution, specifically, is the one that compounds most dramatically over time — and it requires earned income to open. Every summer that passes without it is a window that doesn't reopen.