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Math · Consumer Math

Chapter 2: Budgeting

Building a Budget

Give every dollar a job.

Lesson
1
Time
About 21 minutes
0 of 12 done

Step 1: Let's Learn

Read it, or press Listen and follow the words.

A budget is a plan for money that has not arrived yet. It is written before the month, not after it.

Fixed expenses

Rent, loan payments and insurance stay the same each month. They are predictable and hard to change quickly.

Variable expenses

Food, fuel and entertainment change month to month. This is where adjustments are actually possible.

The balance

Income minus expenses is the surplus. A negative surplus is a deficit, and it must be closed by cutting or earning more.

Pay yourself first

Treat saving as a fixed expense taken at the start, rather than whatever happens to be left at the end. There is rarely anything left.

A common guideline

A widely used rule allocates about 50% to needs, 30% to wants and 20% to saving and debt. It is a starting point, not a law.

A budget is a plan, not a record

Recording what you spent is bookkeeping. A budget assigns income to categories in advance, so the decisions are made before the money is in hand rather than after it is gone.

Fixed, variable and periodic

Rent is fixed, groceries vary, and insurance premiums arrive occasionally. Periodic costs are the ones that wreck budgets, because they are forgotten until they land. Dividing them by twelve and setting that aside monthly prevents it.

The budget must balance

Income minus planned spending minus planned saving should be zero. A plan that does not balance is not a budget — it is a wish list, and the shortfall becomes debt by default.

Budgets need revising

The first version will be wrong, usually underestimating variable costs. Comparing plan against actual for a couple of months and adjusting is what turns a guess into a working plan.

Step 2: Try It Yourself

Tap and try it out.

Adjust the categories. When the bars total more than income, the budget is in deficit.
Housing1000
Food400
Transport300
Saving400

Housing has the most. It has 700 more than Transport.

Step 3: Watch an Example

One step at a time.

Watch Diego Balance a Month

Diego takes home $2400. Rent is $1000, food $400, transport $300 and other $500.

  1. Step 1

    He totals the expenses: 1000 + 400 + 300 + 500.

Step 4: Your Turn

Practice makes it stick.

The Surplus

Problem 1 of 2

Income $2400, expenses $2200. What is the surplus, in dollars?

dollars

The Deficit

Problem 2 of 2

Income $1800, expenses $2000. What is the surplus, in dollars?

dollars

Plan the Month

1 of 8

Income $3000, expenses $2600. Surplus in dollars?

2 of 8

Expenses $900, $250, $180 and $120. Total in dollars?

3 of 8

The 50-30-20 rule on $3000 net. How much to saving, in dollars?

4 of 8

Same rule and income. How much to needs, in dollars?

5 of 8

Income $2000, expenses $2150. Deficit size in dollars?

6 of 8

Rent $1200 out of $3000 net. What percentage is housing?

7 of 8

Sort each expense by its type.

Tap something to move it.

  • Empty
  • Empty

8 of 8

The 50-30-20 rule on $4000 net. How much to wants, in dollars?

Step 5: Quick Check

Show what you know.

Question 1 of 2

Income $2800, expenses $2500. Surplus in dollars?

Question 2 of 2

What does "pay yourself first" mean?

What You Learned

  • A budget plans money before it arrives.
  • Fixed expenses stay constant; variable ones are where adjustment happens.
  • Treat saving as a fixed expense taken first.