It estimates the article processing charges (APCs) a journal might charge, based on its visibility, prestige, and impact as measured by the SJR. It does not reflect the actual APC, but rather a calculated approximation based on journal quality.
| Year | Est. APC (USD) |
| 1999 | 3261 |
| 2000 | 3280 |
| 2001 | 3297 |
| 2002 | 3294 |
| 2003 | 3336 |
| 2004 | 3376 |
| 2005 | 3383 |
| 2006 | 3389 |
| 2007 | 3409 |
| 2008 | 3396 |
| 2009 | 3393 |
| 2010 | 3429 |
| 2011 | 3491 |
| 2012 | 3556 |
| 2013 | 3590 |
| 2014 | 3610 |
| 2015 | 3632 |
| 2016 | 3639 |
| 2017 | 3607 |
| 2018 | 3613 |
| 2019 | 3623 |
| 2020 | 3660 |
| 2021 | 3678 |
| 2022 | 3667 |
| 2023 | 3645 |
| 2024 | 3625 |