Estimate a retirement corpus and the regular savings needed to build it. The model includes rising expenses, a chosen retirement horizon and separate return assumptions before and after retirement.
How to use the Retirement Planning calculator
Choose your current age, retirement age and the age through which the plan should fund expenses. Enter retirement-style monthly expenses in today’s rupees and the savings already earmarked for retirement. Then compare inflation and separate return assumptions before and after retirement.
- Timeline
- Use whole ages. Retirement age must be later than current age, and the plan-through age must be later than retirement.
- Monthly expenses today
- Enter spending you expect to retain in retirement, expressed in today’s rupees.
- Earmarked savings
- Include only the current corpus intended for this goal; no future pension or other assets are automatically added.
- Return before retirement
- An effective annual assumption is converted into equivalent monthly growth for saving years.
- Return after retirement
- Enter a separate effective annual assumption for the withdrawal years.
- Expense inflation
- Expenses rise before retirement and continue to rise monthly at the equivalent rate afterward.
Select Calculate, review the result and its breakdown, then change one input at a time to compare scenarios.
Formula and calculation method
First, today’s monthly expenses grow with inflation to retirement. Required corpus is the present value, at retirement, of the modeled inflation-adjusted monthly expenses over the chosen retirement horizon. Expenses are withdrawn at each month’s beginning. Current savings grow to retirement, and equal end-of-month contributions fill any positive corpus gap.
See the numbers in context
At age 35, retiring at 60 and planning through 90, ₹50,000 monthly expenses today become about ₹2,14,594 at retirement with assumed 6% inflation. With 6% post-retirement returns, the modeled corpus is about ₹7,72,53,673. ₹5,00,000 existing savings growing at an assumed 10% leaves a gap of ₹7,18,36,320, requiring about ₹58,246 monthly until retirement.
Illustrative inputs · rounded to the nearest rupeeWhat your result means
The main result is the estimated corpus needed at retirement, not the monthly savings amount. The summary shows that separate savings requirement. The timeline first builds the corpus and then spends it down. Matching inflation and post-retirement return implies no real growth in this simplified model.
Scenarios worth comparing
- Reduce return assumptions and compare the additional savings required.
- Increase the plan-through age to model a longer retirement.
- Compare a later retirement date or lower retirement-style expenses while keeping other inputs constant.
Assumptions and limitations
- All rates are constant effective annual assumptions; actual returns and inflation vary.
- The model funds the chosen horizon with no desired bequest or terminal reserve.
- Pension income, taxes, investment costs, health-cost shocks and emergency funds are excluded.
- There is no sequence-of-returns simulation; a modeled corpus is not a guarantee of lifetime income.
- i is monthly pre-retirement growth, j is monthly post-retirement growth, h is monthly inflation, N is saving months and T is retired months.
Frequently asked questions
Does this use the 4% rule?
No. It discounts the entered expense stream over a selected finite horizon using your inflation and return assumptions.
Why can the corpus be large?
Expenses are expressed in future rupees and can rise for many years before and after retirement. Check the inflation, horizon and spending assumptions.
What if existing savings already cover the corpus?
Additional monthly savings are set to zero under the model. The projected retirement balance may then remain positive at the plan’s end; it is still an assumption-based estimate.
Educational estimates only. Verify inputs, applicable rules and product terms before making decisions. Read the disclaimer.