Financial Sustainability Framework

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Budget Calculator

Plan your monthly income and expenses.

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Monthly Income
$

Net income, not gross salary

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Fixed Needs (Non-Negotiable)
$
$
$
$
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Variable Wants (Flexible)
$
$
$
$
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Future Self (Savings/Investment)
$
$
$
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Annual Planning
$

Monthly contribution: $100

$

Auto-calculated: 10% of expenses

Personal Savings Rate
28.0%

FIRE Community Metric

Excellent โ€” You're saving $800/month for your future self.

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50/30/20 Budget Analysis
Needs (Target: 50%)48.0%
Wants (Target: 30%)14.0%
Savings (Target: 20%)16.0%

โš ๏ธ Savings below 20%. Consider reducing wants to boost your future self.

Monthly Summary
Total Expenses$4,400
Remaining+$600
Annual Impact of Wants
Dining Out
$3,600/year
That's 10 days of luxury vacation
Hobbies
$2,400/year
Equivalent to a 1.0-day luxury vacation
Travel
$1,800/year

Why 90% of Budgets Fail (And How to Fix Yours)

Most budgets fail not because of math errors, but because of psychological and planning mistakes. Here's what actually works:

The "Buffer" Constant

Always add a 10% "Misc" category for the things you forgot. Car repairs, medical copays, birthday giftsโ€”they add up. A budget without a buffer is a budget that fails.

Net vs. Gross: The Critical Mistake

Budgeting must be done with Take-Home Pay, not gross salary. Taxes, health insurance, and 401k deductions reduce your actual spending power by 25-40%. Budgeting with gross pay guarantees overspending.

The "Want" Analysis

Distinguish between a "Need" (Internet for work) and a "Want" (Gigabit Speed). Most people inflate their needs category by including wants. Be honest: is that premium subscription a need or a want?

The Sinking Fund Reality

Annual expenses (holidays, vacations, car registration) destroy budgets when forgotten. A $1,200 annual expense needs $100/month. Plan for it, or it becomes debt.

The 50/30/20 Budget Rule: A 2026 Guide

Master the art of budgeting by commitment level. How to create a budget that works. Learn why most budgets fail. 50/30/20 rule. No sign-upโ€”all calculations run locally.

Understanding the 50/30/20 Rule

50% for Needs

  • Housing:
    Rent or mortgage payment
  • Utilities:
    Electricity, water, internet, phone
  • Insurance:
    Health, auto, renters/homeowners
  • Minimum Debt:
    Required payments only

If this exceeds 50%, you're "house poor" or over-leveraged.

30% for Wants

  • Dining Out:
    Restaurants, coffee shops
  • Entertainment:
    Streaming, hobbies, travel
  • Lifestyle:
    Non-essential purchases

This is your "fun money"โ€”flexible and adjustable.

20% for Savings

  • Retirement:
    401k, IRA contributions
  • Emergency Fund:
    3-6 months expenses
  • Investments:
    Brokerage, additional savings

This is your "Future Self" categoryโ€”non-negotiable.

Scope & Limits

  • Scope & Limits:
    50/30/20 is a guideline; actual allocations vary by circumstance. All calculations run in your browser; no data is sent to servers. Verify with a qualified financial professional for significant budgeting or investment decisions.

Budget Calculator FAQ

? Why do I need to budget with take-home pay, not gross salary?

Your gross salary is reduced by 25-40% through taxes, health insurance, and retirement deductions. Budgeting with gross pay means you are planning to spend money you do not actually have, which guarantees overspending and budget failure.

? What is a sinking fund and why do I need one?

A sinking fund is money set aside monthly for annual expenses like holidays, vacations, car registration, or insurance premiums. If you spend $1,200 on Christmas gifts annually, you need $100/month in your budget. Without this, annual expenses become debt.

? What is the 10% buffer for?

The 10% buffer accounts for forgotten expenses: car repairs, medical copays, birthday gifts, home maintenance. A budget without a buffer fails because life is unpredictable. This buffer prevents budget failures from unexpected costs.

? How do I distinguish between a need and a want?

A need is essential for survival or work: basic internet for remote work. A want is a choice or upgrade: gigabit internet speed, premium streaming tiers, dining out. Be honestโ€”most people inflate their needs category with wants.

? What is Personal Savings Rate and why does it matter?

Personal Savings Rate is the percentage of your take-home pay that you save and invest. It is a key FIRE (Financial Independence, Retire Early) metric. A 20%+ rate is excellent, 30%+ is aggressive, and 50%+ is FIRE territory. This metric shows your true financial progress.

? What if my needs exceed 50% of my income?

If your fixed needs exceed 50%, you are likely "house poor" or over-leveraged. Consider: Can you reduce housing costs? Refinance debt? Increase income? The 50/30/20 rule is a guidelineโ€”if you live in a high-cost area, you may need to adjust, but aim to keep needs as low as possible.

? Should I include extra debt payments in savings or needs?

Minimum required debt payments go in "Needs" (the 50% category). Any extra payments beyond the minimum go in "Savings" (the 20% category) because they are accelerating wealth building, not just meeting obligations.
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Financial Estimation Note

General Projections: Results are mathematical estimates based on current rates and standard formulas (including 2026 tax brackets). They are intended for high-level planning only.

No Advice Provided: This site does not provide financial, tax, or legal advice. Using this tool does not create a client-advisor relationship with CalcRegistry.

Confirm Numbers: Financial laws change frequently. Please verify all results with a qualified professional (CPA, Financial Planner, or Lawyer) before making significant financial decisions.

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