Maintenance estimator
There is no formula in Indian law. This shows the range courts have tended to work within, and shows its own arithmetic so you can argue with it.
Enter the paying spouse's monthly income to see a range.
Nothing here is calculated by any court. This is an arithmetic sketch from the benchmark the Supreme Court used in Kalyan Dey Chowdhury v. Rita Dey Chowdhury (2017) — around a quarter of net salary for a spouse — widened into a range. Your matter turns on facts it does not ask about: liabilities actually being serviced, the standard of living during the marriage, a career given up, health, and what both of you put in your affidavits of disclosure.
Questions
Is there a formula for maintenance in India?
No. No statute sets a percentage. The Supreme Court in Kalyan Dey Chowdhury v. Rita Dey Chowdhury (2017) treated around a quarter of net salary as just and proper for a spouse, and that benchmark is what practice has grown around — but every award turns on the facts of the case.
Does the wife's own income reduce maintenance?
It is one of the factors. A claimant with an income of their own needs less, but courts also weigh earning capacity, a career given up during the marriage, and who the children live with.
From when is maintenance payable?
Ordinarily from the date of the application, not the date of the order. Where a matter runs for two years, the arrears can be larger than the monthly figure.
Is maintenance for children counted separately?
Yes. A child's right to be maintained is the child's own, and education costs are usually dealt with separately from monthly maintenance.
The whole picture, including which provision to claim under and what goes in the affidavit of disclosure, is in how courts actually decide maintenance.