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Budget Calculator
Plan monthly spending with needs, wants, savings, and remaining cash flow using a 50/30/20 style budget structure.
Interactive calculator
Plan a 50/30/20 style monthly budget
Group your spending into needs, wants, and savings so you can compare your current budget with the classic 50/30/20 guideline.
Visual breakdown
Monthly income allocation
This view shows how your income is currently split across needs, wants, savings, and any amount still left unassigned.
Needs
$3,700
61.7% of total
Wants
$750
12.5% of total
Savings
$1,200
20% of total
Unallocated
$350
5.8% of total
Results
Needs
$3,700
61.7% of income vs 50% target
Wants
$750
12.5% of income vs 30% target
Savings
$1,200
20% of income vs 20% target
Remaining cash flow
$350
Income not yet allocated to spending or saving.
How to use it
- 01Enter your monthly after-tax income.
- 02Fill the major need, want, and savings categories that currently make up your monthly plan.
- 03Compare the resulting allocation with the 50/30/20 guideline and review any unallocated cash flow or shortfall.
Result guide
- Needs, wants, and savings are shown both as dollar amounts and as shares of monthly income.
- Remaining cash flow is positive when income still has room left and negative when spending exceeds income.
- The 50/30/20 model is a rule of thumb rather than a hard compliance standard.
About this calculator
Budget pages perform well because they help users move from vague financial stress to a concrete monthly plan. A 50/30/20 style model is a familiar entry point for that planning.
This version focuses on after-tax income and a practical set of monthly categories, which makes it useful as a simple planning tool without becoming an accounting app.
Frequently asked questions
Why use after-tax income instead of gross pay?
Because a monthly budget should be based on the money actually available to spend or save after payroll taxes and deductions.
Do debt payments count as needs or savings?
Minimum debt obligations are commonly treated as needs in simple budgeting frameworks like this one.
What if my budget does not fit 50/30/20 exactly?
That is normal. The guideline is best used as a reference point for adjustment rather than a rigid pass-or-fail rule.
Reviewed by Sarah Jenkins, CPA
Certified Public Accountant (CPA) & Certified Financial Planner (CFP Board)
Reviews consumer credit, US tax brackets, home mortgage amortization calculations, and IRS publication compliance.
Sources: Per IRS Publication / Freddie Mac guidelines/Tax Year 2025/Consumer Finance Protection Bureau educational materials/Standard loan amortization and compound-growth formulas
Disclaimer: Mortgage and tax projections are based on Tax Year 2025 IRS regulations and standard amortization conventions. Under US regulatory laws, these calculations are for informational use only and do not constitute CPA, CFP, or legal financial advice.
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