Home Budget Calculator

Monthly household budget — editable income and expense rows by category, with totals, surplus/deficit, expense share %, and rule-of-thumb guidance

Income OFF
Spending OFF
Net Position OFF
Top Category OFF
Savings Rate OFF
50/30/20 Guide OFF

Income

Every income source your household receives in a typical month is an editable row here.

total income = Σ income rows
  • Rows are free-form — a pay cheque (net take-home), freelance work, rental income, benefits, or a side gig.
  • Monthly basis — enter what arrives per month; the tool works in monthly dollars.
  • Use net (after-tax) income so the output reflects what the household can actually spend and save.

Spending

Each expense row belongs to one of eight categories: housing, utilities, transport, food, insurance, debt, savings, or personal/other. Savings is kept as a spending row so it is deliberately treated as money you pay yourself.

total spending = Σ expense rows
category total = Σ rows in that category
  • Description — free-form label such as “Rent” or “Groceries”.
  • Category — the bucket the amount is reported under.
  • Amounts are monthly and non-negative.

Net Position

The headline result: whether the household clears its month after all spending rows, including savings.

net surplus/deficit = total income − total spending
  • Surplus — money left over at month end.
  • Deficit — spending exceeds income; the gap must be covered by credit, savings drawdown, or borrowing.

Top Category & Expense Share

Every category is reported as a share of total spending, so you can see at a glance where the money goes.

expense share % = category total ÷ total spending
  • The top category module flags the single largest bucket.
  • Housing typically dominates — a share above 50% may warrant attention.
  • Shares always sum to 100% of spending (when savings is included).

Savings Rate

The share of income routed to the savings category (retirement, emergency fund, investments), measured against the 15–20% range financial planners commonly cite.

savings rate % = savings total ÷ total income
  • Debt payments are kept separate from savings in the guidance below.
  • A rate of 15% or more is treated as healthy; below 10% is a warning.

50/30/20 Guide — Rule of Thumb

The popular 50/30/20 rule splits net income into needs, wants, and savings plus debt reduction.

needs ≤ 50% · wants ≤ 30% · savings+debt ≥ 20%
needs  = housing + utilities + transport + food + insurance
wants  = personal / other
sav+debt = savings + debt categories
  • Rule of thumb, not financial advice — it is a widely used starting point, not tailored guidance. Adjust the split to your income level, family size, debt load, and goals.
  • The label is compared against the 50 / 30 / 20 targets with a ±3 point tolerance (e.g. needs up to 53% still counts as on-target).
  • Shared mortgages and expensive cities often push needs above 50% for pragmatic reasons.
💵 Income Sources Monthly
Source Amount / month
Total income / month$0.00
📈 Expense Rows by Category Monthly
Description Category Amount / month
Total spending / month$0.00
📊 Net Result
Total Income / mo
$0.00
Total Expenses / mo
$0.00
Net Surplus / Deficit
$0.00
📋 50/30/20 Guidance Rule of thumb
Waiting for income
Needshousing · utilities · transport · food · insurance
0.0%
of 50%
Wantspersonal / other
0.0%
of 30%
Savings + Debtpay yourself, then pay down debt
0.0%
of 20%
50/30/20 is a widely used rule of thumb, not tailored financial advice — adjust the split to your own income, obligations, and goals.
💰 Category Totals & Expense Share
Category Monthly total Share of spending Share bar