What if you'd held ADP?
A $1,000 investment in Automatic Data Processing, Inc. (ADP) at the month-end close of 1980-03 would be worth $696,533 at the close of 2026-08 — +69553.3% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $75,502.
Your scenario
Result
If you'd bought $1,000 at the start of each year
Value of $1,000 invested on January 1 of each year, held to 2026-08, dividends included. Click any year for the full story.
Every year, $1,000 from 1980
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1980 | $1,000 | — |
| 1981 | $1,014 | +1.4% |
| 1982 | $1,495 | +47.4% |
| 1983 | $1,450 | -3.0% |
| 1984 | $1,621 | +11.8% |
| 1985 | $2,484 | +53.3% |
| 1986 | $3,002 | +20.8% |
| 1987 | $3,856 | +28.5% |
| 1988 | $3,372 | -12.6% |
| 1989 | $4,324 | +28.2% |
| 1990 | $4,791 | +10.8% |
| 1991 | $8,225 | +71.7% |
| 1992 | $9,696 | +17.9% |
| 1993 | $10,183 | +5.0% |
| 1994 | $10,900 | +7.0% |
| 1995 | $13,976 | +28.2% |
| 1996 | $16,310 | +16.7% |
| 1997 | $23,574 | +44.5% |
| 1998 | $31,040 | +31.7% |
| 1999 | $42,014 | +35.4% |
| 2000 | $49,697 | +18.3% |
| 2001 | $46,678 | -6.1% |
| 2002 | $31,422 | -32.7% |
| 2003 | $32,161 | +2.4% |
| 2004 | $36,490 | +13.5% |
| 2005 | $38,324 | +5.0% |
| 2006 | $41,818 | +9.1% |
| 2007 | $42,751 | +2.2% |
| 2008 | $38,879 | -9.1% |
| 2009 | $43,811 | +12.7% |
| 2010 | $48,917 | +11.7% |
| 2011 | $58,770 | +20.1% |
| 2012 | $63,787 | +8.5% |
| 2013 | $92,863 | +45.6% |
| 2014 | $111,761 | +20.4% |
| 2015 | $116,344 | +4.1% |
| 2016 | $144,604 | +24.3% |
| 2017 | $168,522 | +16.5% |
| 2018 | $192,545 | +14.3% |
| 2019 | $255,522 | +32.7% |
| 2020 | $270,488 | +5.9% |
| 2021 | $385,720 | +42.6% |
| 2022 | $380,756 | -1.3% |
| 2023 | $379,808 | -0.2% |
| 2024 | $487,711 | +28.4% |
| 2025 | $438,064 | -10.2% |
| 2026 | $479,619 | +9.5% |
Best and worst month-end to buy
The best single month-end close to have bought ADP was 1980-03 ($0.40): $1,000 then is $696,533 today. The worst was 2025-05 ($315): $1,000 then is $880.
FAQ
What would $1,000 in ADP be worth today?
A $1,000 investment in Automatic Data Processing, Inc. (ADP) at the start of 1980 would be worth about $696,533 today, a total return of +69553.3%. Dividends are reinvested in these figures.
What were the best and worst years for ADP?
Automatic Data Processing, Inc. (ADP)'s strongest calendar year since 1980 was 1991, a +71.7% return — $1,000 held through that year became about $1,717 by year-end. Its weakest year was 2002, at -32.7%.
Does the calculator include dividends and splits?
Yes where available. Prices are adjusted for both stock splits and reinvested dividends (total return), the same measure brokerages use.
How much would $100 per month in ADP have grown?
Investing $100 at the end of every month since 1980-03 would have grown to about $4.14M on $55,800 invested.
Did ADP beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $75,502. ADP beat the S&P 500 by +822.5% in total return.
Is this investment advice?
No. What If I'd Held is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Automatic Data Processing, Inc. (ADP) historical total-return data from 1980-03 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices from Yahoo Finance historical data — adjusted for stock splits and reinvested dividends — the same convention used by major brokerages. A "year" scenario invests $1,000 at the prior December's month-end close and values it at the latest available month-end close. Non-USD amounts are converted at historical month-end exchange rates (Yahoo Finance): to USD on the buy date and back to your currency at the latest rate, so the return reflects the currency move as well as the asset.
Month-end resolution means intra-month extremes are not captured in tables; the calculator uses exact trading-day closes where daily data is available. Figures ignore taxes, fees, and the currency effects of non-USD listings. History is not a forecast. What If I'd Held is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.