Budget Calculator
The 50/30/20 rule splits take-home pay three ways: no more than 50% to needs, no more than 30% to wants, and at least 20% to savings and extra debt repayment. Enter your income and your monthly outgoings to see the shares you are actually running, and the amount of money that would have to change category for the split to land on target.
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Off the 50/30/20 split by
$900
Wants share of take-home
18.0%
Details
Updates as you typeWhat actually lands in your account each month, after tax and payroll deductions.
Rent or mortgage payment, property tax, home insurance, and utilities.
Car payment, fuel, insurance, maintenance, or transit passes.
Food eaten at home. Restaurants and takeaway belong under wants.
Health insurance, childcare, phone, and the minimum payment on every debt.
Dining out, subscriptions, hobbies, travel, shopping — anything you could pause.
Money you move out on purpose: emergency fund, investments, retirement, and anything paid above a debt minimum.
Summary
Drifting — 10% to 20% out of placeOff the 50/30/20 split by
$900
Total budgeted
$4,750
- Needs$3,15066%
- Wants$90019%
- Savings$70015%
- Needs share of take-home
- 63.0%
- Wants share of take-home
- 18.0%
- Savings share of take-home
- 14.0%
- Needs vs the 50% target
- $650
- Wants vs the 30% target
- -$600
- Savings vs the 20% target
- -$300
- Unallocated each month
- $250
- Needs are 63% of take-home pay, 13 points above the 50% guideline — $650 a month. Housing is usually the line to attack, because it is the largest and the only one a move or a refinance changes permanently.
- Savings are 14%, 6 points short of the 20% target — $300 a month. Raising it by that amount is what closes the gap; everything else is where the money comes from.
- $250 a month is not assigned to anything. Unassigned money is usually spent, so counting it as savings would take savings to 19%.
How this is calculated
- Housing
- $1,600
- Transport
- $450
- Groceries
- $600
- Other essentials
- $500
- Needs subtotal
- $3,150
- Wants
- $900
- Savings
- $700
- Total budgeted
- $4,750
- Monthly take-home pay
- $5,000
- Unallocated
- $250
- Needs target (50%)
- $2,500
- Wants target (30%)
- $1,500
- Savings target (20%)
- $1,000
- Over target, added up
- $900
- Share of take-home pay out of place
- 18.0%
Compare scenarios
See how one change moves the result
- CurrentYour inputs as they stand$900Current
- Monthly take-home pay$ 6,300$1,550
- Housing$ 2,000$1,050
For informational purposes only. This is not financial advice — confirm major decisions with a licensed advisor.
Frequently asked questions
What counts as a need rather than a want?
A need is something you would still have to pay for if your income halved: housing and utilities, transport to work, groceries, insurance, childcare, and the minimum payment on every debt. A want is the version you choose because you can afford it — restaurants rather than groceries, a newer car than you need, subscriptions you could cancel this afternoon. When a line is genuinely both, split it: a basic phone plan is a need, the extra data is a want.
Is the 50/30/20 rule based on gross or take-home pay?
Take-home pay — what reaches your account after tax and payroll deductions. Using gross pay would make every share look smaller than it is and would count money you never receive. One exception is worth knowing: if retirement contributions come out of your pay before it reaches you, they already count toward the 20%, so add them back into income and into savings rather than ignoring them.
What does the headline number actually mean?
It is the smallest amount of money that would have to move between categories each month for your budget to sit exactly on 50/30/20. Because the categories add up to your income, whatever is over the guideline in one place is exactly what is short somewhere else, so a single figure describes both. It is a distance from the target, not a bill — nothing is being spent twice.
What if my needs are well over 50%?
That is common in expensive housing markets and on lower incomes, where rent alone can pass 50% of take-home pay. The rule then stops being a realistic split and starts being a diagnosis: the gap is telling you the arithmetic cannot be fixed by cutting subscriptions. Housing, transport, and income are the only levers big enough to close it, and all three take months rather than weeks.
Does paying off debt count as savings or as a need?
The minimum payment on each debt is a need, because missing it has consequences. Anything you pay above the minimum counts toward the 20%, because it builds net worth exactly the way a deposit into an investment account does — it just does it by removing a liability instead of adding an asset.
What should I do with money the budget leaves unallocated?
Assign it. Take-home pay that has no job attached is usually spent without a decision, which is why this calculator treats unassigned money as being out of place rather than as a cushion. If your savings share is below 20%, sending the unallocated amount there is the cheapest way to close the gap, because it needs no cut anywhere else.