Zero-based budgeting: give every euro a job

Zero-based budgeting rests on a simple idea: when you've finished planning, there should be no "unassigned" euro left. Income minus planned spending equals zero.

That doesn't mean spend everything. It means assign everything.

The principle

Every euro that comes in gets a mission before the month begins:

• This much for rent
• This much for groceries
• This much for leisure
• This much for savings
• This much for that holiday project

When you're done, the total of your assignments must equal your income. Exactly. Savings and projects count as "expenses": you give your money a job instead of letting it drift.

Why zero, not a surplus

Leaving an amount "left over" with no name is the best way to spend it without noticing. By forcing zero, you consciously decide where every euro goes — including towards your savings.

Who it suits

This method takes a bit more discipline than 50/30/20. It's ideal if:

• You want to understand exactly where your money goes
• You have precise goals (paying off a loan, building a reserve)
• You like total control

If you're starting out, begin with 50/30/20 instead, then move to zero-based when you want to fine-tune.

Make it sustainable

The trap of zero-based budgeting is that it quickly becomes time-consuming by hand. Re-sorting every transaction, checking every envelope… you give up fast.

With Trya, you create envelopes for each mission, your spending sorts itself in automatically, and you see in real time what's left in each one. Zero-based budgeting without the chore.