Include the bills that don’t arrive every month.
Start with take-home income. Subtract regular costs, including required debt payments. Then subtract known yearly bills divided by 12, such as insurance renewals or school fees. Do not count a bill again if it is already in your regular costs.
Example · monthly budget
₹15,000 left can really mean ₹10,000.
- Take-home income
- ₹60,000
- Regular monthly costs
- − ₹45,000
- Yearly bills: ₹60,000 ÷ 12
- − ₹5,000
- Left after known costs
- ₹10,000
Without allowing for yearly bills, this person would overestimate their spare money by ₹5,000 each month.
This covers predictable costs. It does not include unexpected emergencies or savings for other goals.
What does the amount left tell you?
A positive amount is money you can allocate to other needs or goals. Zero means there is no spare margin. A negative amount means planned costs exceed income: first check for missing income or costs counted twice, then review what can realistically change.
Compare your estimate with actual spending next month, and update it when income or bills change.
Sources & limits
Fictional example for education, not personalised advice or a recommendation. Official resources do not imply endorsement of this site. Full disclaimer.