Zero-based budgeting, with envelopes
A zero-based budget gives every dollar of income a job, until income minus everything you've planned comes to exactly zero. Here is how to build one, a worked month, and how envelopes keep it on track once the month starts.
What "zero-based" means
Most budgets start from last month and adjust. A zero-based budget starts from zero every month: you take the income you have and assign all of it, bill by bill and goal by goal, until nothing is left unassigned.
Income − everything assigned = $0
Zero doesn't mean spending everything. Savings, debt payments and money set aside for later are jobs too. The zero means no dollar is left without a decision, so nothing drifts away unnoticed.
Build one in five steps
- Write down this month's income. Only money that has arrived or certainly will; take-home pay, not salary.
- List the bills. Housing, utilities, insurance, minimum payments: what must be paid and when.
- Plan everyday spending. Groceries, transport, personal spending. Look at what last month really cost, not what you hope it will.
- Give the rest to goals. Extra debt payments, an emergency fund, retirement, and a little each month for yearly costs like Christmas or a vacation.
- Assign until it reaches zero. If money is left, give it a job. If you're short, trim the plan until it fits. The budget is done when income minus the plan is exactly $0.
A worked month
Two paychecks bring in $5,200. Every dollar is assigned:
| Group | Line | Amount |
|---|---|---|
| Bills | Mortgage | $1,450 |
| Bills | Utilities | $220 |
| Bills | Insurance | $180 |
| Everyday | Groceries | $700 |
| Everyday | Transportation | $350 |
| Everyday | Kids' activities | $150 |
| Everyday | Personal spending | $200 |
| Goals | Credit card payoff | $600 |
| Goals | Emergency fund | $400 |
| Goals | Retirement | $650 |
| Goals | Christmas fund | $100 |
| Goals | Vacation | $200 |
| Income − assigned | $5,200 − $5,200 = $0 | |
Bills take $1,850, everyday spending $1,400 and goals $1,950. Saving and paying down debt are planned lines, not whatever is left over.
Zero-based budgeting and envelopes
A zero-based budget is a plan made at the start of the month. What it doesn't tell you, halfway through the month, is how much of each line is left. That's what envelope budgeting adds: each line becomes an envelope holding its money, spending comes out of the right one, and every envelope shows what's left.
The two fit together exactly. Assigning every dollar is the zero-based part; spending from envelopes keeps the plan honest for the rest of the month.
When real life changes the plan
- Overspent a line? Move money into it from another line, deliberately. The total stays at zero; you've only decided what gives.
- Irregular income? Budget only what has arrived. Fill the most important lines first, and the rest as more money comes in.
- Money left at month's end? It's still assigned: leave it in its line, or move it to a goal next month.
- Yearly costs? Give them a monthly line, like the Christmas fund above, so the money is there when the bill is.
Common questions
Does zero-based budgeting mean I have no money left?
No. It means every dollar has a job, and savings, an emergency fund and extra debt payments are jobs. You end the month with money set aside on purpose instead of left over by accident.
How is zero-based budgeting different from envelope budgeting?
Zero-based budgeting is the plan: assign all income until nothing is left unassigned. Envelope budgeting is how you keep to it while you spend, by giving each line its own envelope and spending only what is in it. Most people who do one end up doing both.
How often should I make a zero-based budget?
Every month, or every paycheck if you are paid at uneven times. After the first month most lines carry over, so it becomes a short review rather than a fresh start.
Is there an app for zero-based budgeting?
Yes, several. An envelope budgeting app is a natural fit, because "ready to budget" is the unassigned money a zero-based budget brings to zero.
Zero-based budgeting in ShowMeTheMoney
ShowMeTheMoney, the envelope budgeting app, works this way from the start:
- Ready to budget is every account balance minus everything assigned to envelopes: the number a zero-based budget brings to zero.
- Budgets are the plan: how much each envelope needs and how often, including yearly costs filled a little each month, with each envelope's lowest, highest and average month beside it.
- Stuff by Budget fills every envelope to plan from Income in one step, showing the whole plan before it moves anything.
- Envelopes keep it on track as you spend, and moving money between them can never overdraw the one it comes from.
