Softonic

Budget Calculator

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Enter your monthly after-tax income and the calculator splits it across the three buckets Elizabeth Warren popularised: 50% needs, 30% wants, 20% savings and debt payoff. Add your real expenses underneath and you’ll see whether you’re inside the guideline or bleeding out of one category. Switch to zero-based mode if you want to assign every dollar manually.

How the 50/30/20 budget is calculated

  1. 1

    Enter monthly net income

    Take-home pay after tax, 401k and health premiums. Add side-gig income if it's regular.

  2. 2

    Fill in fixed needs

    Rent or mortgage, utilities, groceries, insurance, minimum debt payments — anything required to keep the lights on.

  3. 3

    Fill in wants

    Dining out, streaming, hobbies, travel, non-essential subscriptions. Anything you could cut without moving house.

  4. 4

    Fill in savings and debt payoff

    Emergency fund contributions, retirement on top of employer match, extra debt payments beyond minimums.

  5. 5

    Read the gap

    The calculator flags overages or shortfalls in each bucket and shows how much you'd need to move to hit 50/30/20.

The 50/30/20 breakdown

Bucket Share What goes here
Needs 50% Rent/mortgage, utilities, groceries, transport to work, insurance, minimum debt payments
Wants 30% Dining, streaming, gym, hobbies, non-work travel, personal shopping
Savings & debt payoff 20% Emergency fund, retirement above match, extra debt payoff, investment accounts

Example: $5,000 net per month

  • Needs cap: $2,500
  • Wants cap: $1,500
  • Savings floor: $1,000

If rent alone is $2,200, the needs bucket is almost full before groceries. That’s the signal to move, get a roommate, or accept shrinking wants and savings — because cost of housing is the single biggest lever on a budget.

Zero-based alternative

50/30/20 is a sanity check, not a plan. Zero-based budgeting assigns every single dollar a job before the month starts:

Income            $5,000
- Rent              -$1,500
- Groceries           -$500
- Utilities           -$200
...
= $0 (every dollar assigned)

If it adds up to something other than zero, you find the missing category or move the surplus into savings. Zero-based is more work but catches the “where did my money go” question that percentage targets miss.

Common pitfalls

  • Irregular income — use the average of your lowest three months, not the peak.
  • Yearly expenses — divide by 12 and budget monthly (insurance renewal, car registration, holidays).
  • Sinking funds — set aside 1/12 of big irregular costs each month so they don’t ambush you.
  • Lifestyle creep — if income rises, keep the same wants bucket and funnel the raise into savings until you recalibrate deliberately.

Frequently Asked Questions

In expensive metros, needs often push past 50% and wants shrink accordingly. The rule is a target, not a law — the point is to notice when one bucket dominates and decide if that’s okay.

The employer-match portion often feels like a need; everything beyond the match is savings/investing. The calculator lets you categorise either way depending on how you think about it.

Yes — high-interest debt (credit cards, payday loans) should dominate the 20% until cleared. Mortgages at sub-inflation rates are typically left at minimum so extra goes to investing.

No — all figures are processed in your browser and cleared when you leave the page. Use your notes app or a spreadsheet to persist your plan.

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