A monthly household budget with surplus and savings rate.
Monthly surplus
—
Total expenses
—
Savings rate
—
20% target
—
Your breakdown
Updates live as you type| Item | Value |
|---|
Worked example
Take a net monthly income of 3,200 euro, with 1,300 euro on rent or mortgage, 250 euro on utilities, 450 euro on groceries, 200 euro on transport, and 400 euro on other spending. Total expenses come to 2,600 euro, leaving a monthly surplus of 600 euro. That surplus is 600 divided by 3,200, a savings rate of about 18.8%. The 50/30/20 guide suggests saving 20% of net income, which here is 640 euro a month, so this budget falls just short of the target by about 40 euro. Trimming one category, or directing a pay rise straight to savings, would close the gap and push the rate over 20%.
How it is calculated
The tool adds up your monthly spending across rent or mortgage, utilities, groceries, transport, and an other category, then subtracts that total from your net monthly income to give the surplus. The savings rate is the surplus divided by income, expressed as a percentage, and it is the single most useful number in any budget because it captures both how much you earn and how much you keep. The 50/30/20 rule is a rough framework: about 50% of net income on needs, 30% on wants, and 20% saved. Rather than forcing your spending into those exact buckets, the calculator simply compares your actual surplus against the 20% savings target, so you can see at a glance whether there is room to save more. It is a guide, not a rule, and a high rent area or a temporary expense can pull the figure around in any given month.