Household Budget Calculator — 50/30/20 Rule
Plan your household budget with the 50/30/20 method: needs, wants, savings. Free personal finance calculator.
The household budget balance calculator helps every household quickly assess its financial situation. Enter your monthly net income and expenses in four categories: housing, food, transport and other. The calculator shows total expenses, monthly balance (surplus or deficit), the percentage share of each category and your savings rate. A practical tool for anyone planning a budget, looking to cut costs or set a savings goal.
Step 1 — enter your monthly net income (after taxes and social contributions). Step 2 — enter expenses in each of the four categories: housing (rent/mortgage, utilities), food (groceries, restaurants), transport (fuel, tickets, car instalment), other (clothing, health, entertainment). Step 3 — the calculator sums expenses and subtracts them from income. Step 4 — for each category the percentage share of income is calculated. Step 5 — savings rate = balance / income × 100%. A positive result is a surplus; a negative result is a deficit.
Net income: PLN 6,000. Expenses: housing PLN 1,800 (30%), food PLN 900 (15%), transport PLN 500 (8.3%), other PLN 700 (11.7%). Total expenses = PLN 3,900. Monthly balance = 6,000 – 3,900 = PLN 2,100 surplus. Savings rate = 2,100 / 6,000 × 100% = 35%. This means 35% of income can go towards savings or debt repayment.
A household budget balance is a summary of monthly household income and expenses. A positive result means a surplus (money available for saving or investing), while a negative result means a deficit — you are spending more than you earn.
Household budget balance = total net income – total monthly expenses. In the calculator you enter your net income and expenses split into categories: housing, food, transport and other. The result is shown instantly.
The housing category includes: rent or mortgage instalment, utility bills (electricity, gas, water), internet, landline phone and home insurance. These are fixed costs that are difficult to avoid.
A negative balance means expenses exceed income. Review each spending category and look for savings: reduce impulse purchases, renegotiate contracts (internet, mobile), cancel expensive subscriptions or consider increasing your income.
Personal finance guidelines suggest that housing costs should not exceed 30% of net income. If your share is higher, consider a smaller home, a cheaper rental or finding a flatmate to share costs.
If your budget balance is positive, you can save the surplus every month. It is recommended to save at least 10–20% of net income. Use the savings goal calculator to find out how long it will take to reach your target amount.
The household budget balance calculator works with monthly figures. To include irregular expenses (e.g., annual insurance, holidays), add them up and divide by 12 to get a monthly equivalent to enter in the "other expenses" field.
It is recommended to calculate the household budget balance every month — ideally at the start of the month as a plan, and at the end as a summary of actual spending. Regular monitoring helps identify unnecessary costs and build a saving habit.
The savings rate is the ratio of the surplus (balance) to net income, expressed as a percentage. Example: income PLN 5,000, expenses PLN 3,500, balance PLN 1,500 → savings rate = 30%. The higher the rate, the more funds are available for future goals.
Yes. Enter the combined net income of all working household members and the total expenses in each category. You can include childcare costs, school fees, extra-curricular activities and clothing in the "other expenses" field.
Results are indicative only and do not constitute legal, tax or financial advice.
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