How much will $250 a month be worth in 10 years?

Investing $250 a month for 10 years means paying in $30,000 in total. At a hypothetical 7% annual return it would grow to $42,763: $30,000 from your contributions and $12,763 from investment growth. At 4% the balance would be $36,674 ($6,674 of growth), and at 10% it would be $49,966 ($19,966 of growth).

At 4% a year

$36,674

$6,674 of that is growth

At 7% a year

$42,763

$12,763 of that is growth

At 10% a year

$49,966

$19,966 of that is growth

4%, 7% and 10% are example rates, not forecasts. Real returns change from year to year and are never guaranteed, and these figures leave out fees, taxes and inflation.

$250 a month for 10 years at different rates of return

Annual return	Final balance	Total contributed	Interest earned
1%	$31,530	$30,000	$1,530
2%	$33,149	$30,000	$3,149
3%	$34,862	$30,000	$4,862
4%	$36,674	$30,000	$6,674
5%	$38,591	$30,000	$8,591
6%	$40,618	$30,000	$10,618
7%	$42,763	$30,000	$12,763
8%	$45,031	$30,000	$15,031
9%	$47,430	$30,000	$17,430
10%	$49,966	$30,000	$19,966
11%	$52,648	$30,000	$22,648
12%	$55,483	$30,000	$25,483

Assumes no starting balance, a contribution at the end of every month, and a constant rate compounded once a year (an effective annual rate). You pay in $30,000 in every row; only the growth changes, from $1,530 at 1% to $25,483 at 12%.

Try your own numbers

The calculator starts with this example at 7%. Change the amount, rate or time period, add a starting balance, or switch the compounding, and the result updates as you type.

Balance after 10 years

$42,763

29.8% of that is interest. Your balance is 1.43 times what you put in.

Total contributions

$30,000

Interest earned

$12,763

Growth by year

Contributions
Interest

Year-by-year breakdown

Year	Contributions	Interest	Balance
1	$3,000	$95	$3,095
2	$6,000	$407	$6,407
3	$9,000	$950	$9,950
4	$12,000	$1,742	$13,742
5	$15,000	$2,799	$17,799
6	$18,000	$4,140	$22,140
7	$21,000	$5,785	$26,785
8	$24,000	$7,755	$31,755
9	$27,000	$10,073	$37,073
10	$30,000	$12,763	$42,763

How much is your money and how much is growth?

At 7%, 10 years is not long enough for growth to overtake what you pay in: growth is 30% of the final balance and the other 70% is your own money. Keep contributing at the same pace and growth would pass contributions during year 19. A different rate moves that point, but not into these 10 years: it would come in year 14 at 10% and in year 33 at 4%.

In year 10 alone, the balance earns $2,690 at 7%. That is less than the $3,000 you add that year, and compares with $95 of growth in year 1.

What if you change the plan?

Each row changes one thing and keeps everything else the same, at the 7% example rate. The comparison is with $250 a month for 10 years, which ends at $42,763.

Change	Final balance	Difference
Keep contributing for 5 more years (15 years in total)	$77,776	+$35,013
Start 5 years later (contribute for 5 years)	$17,799	−$24,964
Contribute $300 a month instead of $250	$51,316	+$8,553
Start with $10,000 already invested	$62,434	+$19,672
Contribute at the start of each month instead of the end	$43,005	+$242
Earn 6% a year instead of 7%	$40,618	−$2,145

Starting 5 years later means paying in $15,000 less, but the final balance is $24,964 lower. The gap is bigger than the missing contributions because the earliest payments are the ones with the longest time to grow. A return that is one point lower leaves you with $2,145 less after 10 years, which is roughly what a 1% annual fee would cost.

Working backwards: to reach $100,000 in 10 years at 7%, starting from zero, you would need to invest about $585 a month.

When would the balance reach $100,000?

The table shows the year in which the balance first reaches each amount, assuming the same $250 a month continues for as long as it takes. Years in bold fall within this page's 10-year period.

Balance reaches	At 4%	At 7%	At 10%
$5,000	Year 2	Year 2	Year 2
$10,000	Year 4	Year 4	Year 3
$25,000	Year 8	Year 7	Year 7
$50,000	Year 13	Year 12	Year 11
$100,000	Year 22	Year 18	Year 16

How this is calculated

The rate is treated as an effective annual rate, so the balance grows by exactly 7% over a full year. The monthly rate that compounds to 7% a year is:

Monthly rate = (1 + 0.07)^1/12 − 1 = 0.5654%

With $250 added at the end of each month for 120 months (10 × 12), the contributions grow to:

Balance = 250 × [1.005654¹²⁰ − 1] ÷ 0.005654 ≈ $42,763

The rates shown here are rounded; the result uses full precision. Of that balance, 250 × 120 = $30,000 is your contributions and the remaining $12,763 is growth. Every other row in the rate table uses the same formula with a different annual rate. The compound interest calculator page explains the formulas in more detail.

Frequently asked questions

How much interest will $250 a month earn in 10 years?

It depends on the rate of return. At a constant 7% a year, $250 a month for 10 years earns $12,763 on top of $30,000 in contributions, for a balance of $42,763. At 4% the growth is $6,674, and at 10% it is $19,966. These rates are examples, not predictions.

How long does it take to reach $100,000 investing $250 a month?

With a constant 7% annual return and no starting balance, the balance passes $100,000 during year 18. For comparison, at 10% it takes until year 16, and at 4% it takes until year 22.

How much do I need to invest each month to have $100,000 in 10 years?

At a constant 7% annual return you would need about $585 a month for 10 years, starting from zero. At 4% you would need about $682 a month, and at 10% about $500 a month.

$250 a month over other periods

Other monthly amounts for 10 years

A single lump sum for 10 years

See all compound interest examples in one table, or start from scratch with the compound interest calculator.