Lesson 3 of 15 · Build Your First Budget
Chapter 1 of 7: Money Fundamentals · Split it
0/3
01Split it1/10

A budget is three numbers, not a spreadsheet.

Needs, wants, saving. Move the sliders until the three dollar amounts look like a month you would actually live.

$320
50%
30%
20%

That is exactly 100% of your income allocated.

Needs
Phone, transit, school costs
$160
Wants
Food out, games, clothes
$96
Save
Goal, buffer, long term
$64

50 / 30 / 20 is a starting shape, not a rule. A budget works when the three numbers match your real life and still leave the saving line above zero.

02Why it fails2/10

Most first budgets fail for the same two reasons

They are built on money you hope to have instead of money you actually receive, and they leave no room for anything unplanned. Both are fixable in about ten minutes.

  • Build it from net pay — the amount that lands in the account, not the amount you earned.
  • Give the saving line a real number, even if it is $10.
  • Assume something unexpected happens every month, because it does.
03Predict3/10

Which budget survives a real month?

Two budgets on $300 of net pay: one allocates all $300 exactly, the other allocates $260 and leaves $40 unassigned. Which one is still being used in month three?

Pick one — guessing first is the point.

04Quick check4/10

Quick check

Answering every check in this lesson completes it automatically.

Knowledge check
Your planned spending is higher than your money in. What is the right response?
05Four rules5/10

The four rules that make a budget stick

Tap each one.

06Real situation6/10

Sam's budget broke in week two

Sam allocated all $300 of his net pay: $170 needs, $110 wants, $20 saving. In week two his bus pass was stolen — $52 to replace. There is no unassigned money.

07Check again7/10

Check your understanding

Answering every check in this lesson completes it automatically.

Knowledge check
Which four categories make a simple teen budget?
08Try it8/10

Build yours in five minutes

The Budget Builder does the arithmetic. You bring your real income and your real costs.

Open Budget Builder
09Last check9/10

One more

Answering every check in this lesson completes it automatically.

Knowledge check
Your income changes every month because your shifts vary. What is the most practical approach?
10Takeaway10/10
The one thing to remember

Budget from what lands in the account, and leave room for the month to be a month.

Your progress

0 of 3 checks answered

Up next · Lesson 4 of 15Bank Accounts Explained

Sources

Last reviewed July 23, 2026

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