Useful Cheatsheets
Grow / Finance / Budgeting

Budgeting Basics

Learn the core budgeting ideas: take-home pay, fixed and variable costs, and monthly cash flow.

TL;DR

  1. Build every budget on after-tax takeHomePay, never gross salary.
  2. Split spending into fixedCosts, variableCosts, and savings.
  3. Aim for a positive cashFlow so income beats outgo.
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Start With Take-Home Pay

    Net Pay

    Budget from take-home pay, what remains after taxes, insurance, and retirement leave your gross.

    Gross $4,000 - $900 deductions = $3,100
    Hourly Estimate

    Multiply guaranteed weekly hours by your wage by 4.3 weeks; skip speculative overtime.

    30 hrs x $20 x 4.3 = $2,580/month
    Irregular Income

    Anchor a variable paycheck to your lowest recent month so bills always stay covered.

    Plan from your lowest month, e.g. $2,400
    Extra Income

    Count tips, bonuses, and side gigs only once the money actually lands.

    Add a $300 bonus the month it arrives

Sort Your Fixed Costs

    Housing

    Keep rent or mortgage near or below a third of take-home pay.

    Rent <= 30% of $3,100 = about $930
    Debt Payments

    List the minimum loan and card payments you are contractually required to make.

    Car $250 + student loan $150 = $400
    Core Utilities

    Group power, water, internet, and phone into one predictable monthly baseline.

    Power + water + internet + phone = $300
    Insurance & Fees

    Add premiums that bill the same each month, like renters, auto, and health.

    Renters + auto + health = $220

Name Your Variable Costs

    Groceries

    Set a weekly food target you can flex up or down as prices move.

    $100/week x 4.3 = about $430/month
    Lifestyle

    Cap dining out, streaming, and hobbies together under one clear monthly limit.

    Dining + streaming + fun = $250 cap
    Transportation

    Budget gas, transit, and upkeep, which rise and fall with how much you drive.

    Gas $160 + transit $60 = $220/month
    Personal & Misc

    Leave room for haircuts, gifts, and the small buys that always appear.

    Set aside $80/month for odds and ends

Find Your Monthly Cash Flow

    Surplus

    Subtract every expense from income to see the money left to assign.

    $3,100 - $2,600 spending = $500
    Deficit

    Flag any month where spending outruns income before it becomes debt.

    $3,300 out - $3,100 in = -$200
    Savings Rate

    Track the share of take-home pay you keep, and nudge it up over time.

    $500 saved / $3,100 = 16%
    Assign the Surplus

    Give every leftover dollar a job so it does not quietly disappear.

    $500 -> emergency fund + extra debt

Review and Adjust

    Weekly Check

    Compare each category to its limit weekly, while you can still adjust.

    Sunday: spend vs. plan, 5 minutes
    Keep a Buffer

    Hold a small unassigned cushion so one overage cannot sink the plan.

    $100-$150 buffer absorbs surprises
    Fix the Number

    When a category runs over every month, raise its limit and cut elsewhere.

    Always $480 groceries? Budget $480
    Sweep Leftovers

    Move any unspent money to savings before the next month begins.

    $120 left -> savings, not rollover

Tips

  1. Track every dollar for one month so your variableCosts reflect real habits, not the amounts you wish you spent.
  2. Automate a savings transfer on payday so the money moves out before you can spend it on anything else.

Warnings

  1. Never plan around grossPay; taxes and benefits shrink it, so budgeting from it almost guarantees a monthly shortfall.
  2. Do not treat yearly bills like insurance or holidays as surprises; save for them monthly in a sinkingFund.

In Practice

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