Enter the assumed yearly return — it is never guaranteed.
Pick the saving period, and add any savings you already hold.
Formulas
What
Formula
Example
Monthly deposits’ future value
monthly × (((1+r)^n−1)÷r)×(1+r)
10,000, 10%, 240 mo ≈ 7,656,969
Current savings’ growth
savings × (1+r)^n
100,000, 10%, 12 mo ≈ 110,471
Value in today’s money
total ÷ (1.06)^(years)
7,656,969 ÷ (1.06)^20 ≈ 2,387,479
Monthly deposits count from the start of each month (annuity-due) — end-of-month timing would give slightly less.
Example — default calculation
10,000/month at 10% for 20 years, no current savings: deposits = 10,000 × 240 = 2,400,000 taka. Fund at retirement = ≈ 7,656,969 taka (profit ≈ 5,256,969). At 6% inflation that is worth ≈ 2,387,479 taka in today’s money.
Things to watch
The rate is an assumption: bank interest is fixed, but market returns move. Try 8%, 10% and 12% to see the range.
6% inflation is fixed: the today-money line assumes 6% yearly inflation — change it and the figure changes.
Don’t break compounding: withdrawing mid-way resets growth, and tax or charges may apply. This math assumes the full term.
Frequently asked questions
What is the retirement fund formula?
Monthly deposits count from each month's start (annuity-due): FV = monthly × (((1+r)^n − 1) ÷ r) × (1+r), r = monthly rate. 10,000 at 10% for 240 months ≈ 7,656,969.
Is the return guaranteed?
No. Market-linked investments move up and down — a good past never promises the future. Work with a conservative 8–10% assumption.
How is the today's-money value worked out?
The total fund is discounted at a fixed 6% yearly inflation assumption. Real inflation will differ, so this figure moves with it.
How are current savings treated?
They grow at the same monthly rate for the whole period: savings × (1+r)^n. For example, 100,000 at 10% grows to ≈ 110,471 in a year.
What if I start late?
Time is what compounding feeds on — 15 years instead of 20 (10,000 at 10%) leaves roughly half the fund. Start as early as you can.
Also searched as
retirement calculator Bangladesh · pension planning calculator · old age savings plan · obosor porikolpona