It's the basic credit amount.
Table of Basic Exclusion and Credit Amounts
(as Recalculated for 2024 Rates)
| Period | Exclusion Amounts | Credit Amounts |
| 1977 (Quarters 1 & 2) | $30,000 | $6,000 |
| 1977 (Quarters 3 & 4) | $120,667 | $30,000 |
| 1978 | $134,000 | $34,000 |
| 1979 | $147,333 | $38,000 |
| 1980 | $161,563 | $42,500 |
| 1981 | $175,625 | $47,000 |
| 1982 | $225,000 | $62,800 |
| 1983 | $275,000 | $79,300 |
| 1984 | $325,000 | $96,300 |
| 1985 | $400,000 | $121,800 |
| 1986 | $500,000 | $155,800 |
| 1987 through 1997 | $600,000 | $192,800 |
| 1998 | $625,000 | $202,050 |
| 1999 | $650,000 | $211,300 |
| 2000 and 2001 | $675,000 | $220,550 |
| 2002 through 2010 | $1,000,000 | $345,800 |
| 2011 | $5,000,000 | $1,945,800 |
| 2012 | $5,120,000 | $1,993,800 |
| 2013 | $5,250,000 | $2,045,800 |
| 2014 | $5,340,000 | $2,081,800 |
| 2015 | $5,430,000 | $2,117,800 |
| 2016 | $5,450,000 | $2,125,800 |
| 2017 | $5,490,000 | $2,141,800 |
| 2018 | $11,180,000 | $4,417,800 |
| 2019 | $11,400,000 | $4,505,800 |
| 2020 | $11,580,000 | $4,577,800 |
| 2021 | $11,700,000 | $4,625,800 |
| 2022 | $12,060,000 | $4,769,800 |
| 2023 | $12,920,000 | $5,113,800 |
| 2024 | $13,610,000 | $5,389,800 |
https://www.irs.gov/instructions/i709#en_US_2024_publink1000292380
