Isaiah Hartenstein has become one of the most valuable centers in the NBA, and his bank account shows it.
The Oklahoma City Thunder big man signed a massive three-year contract worth $87 million, marking the biggest payday of his career. His net worth sits around $22.6 million, built through seven seasons of grinding in the league.
Isaiah Hartenstein’s Biography
| Category | Details |
|---|---|
| Full Name | Isaiah Hartenstein |
| Date of Birth | May 5, 1998 |
| Age | 27 years old |
| Nationality | American-German |
| Height | 7 feet 0 inches (2.13 m) |
| Weight | 250 lbs (113 kg) |
| Turned Pro | 2015 |
| Net Worth | $22.6 million |
| Career Earnings | $52.9 million |
| Current Salary | $30 million (2024-25 season) |
| Wife | Kourtney Kellar Hartenstein |
| @ipjh55 | |
| @ipjh55 |
Early Career
Isaiah Hartenstein was born in Eugene, Oregon, on May 5, 1998, to parents Florian and Theresa Hartenstein. His father played basketball at the University of Oregon before taking his talents overseas to play professionally in Germany.
His mother is from Oregon, and the couple met while Florian was still in high school and Theresa was attending college.
Everything changed for the Hartenstein family in 2008 when they packed up and moved to Germany. Isaiah was just 10 years old when his father signed to play with the Giessen 46ers.
The young Hartenstein quickly picked up German and threw himself into the country’s basketball youth system. He spent four seasons playing in Germany’s youth and boys divisions from 2011-12 through 2014-15, developing his skills under his father’s watchful eye.
Professional Career
Hartenstein turned professional in 2015 at just 17 years old, joining the Artland Dragons in Germany’s top league. He didn’t stay there long.
The talented center moved to Žalgiris Kaunas in Lithuania, where he helped the team win the King Mindaugas Cup for the first time in franchise history. His European success caught the attention of NBA scouts, and he declared for the 2017 NBA Draft.
The Houston Rockets selected Hartenstein with the 43rd overall pick in 2017. He split time between the Rockets and their G League affiliate during his first two seasons, trying to find his footing in the world’s best basketball league.
The journey was bumpy. He bounced from Houston to Denver to Cleveland during the 2020-21 season, searching for consistent playing time.
Wife
Isaiah Hartenstein married Kourtney Kellar on July 29, 2023, on a yacht off the coast of Newport Beach, California. The couple’s love story started in 2019 when Hartenstein slid into Kellar’s Instagram DMs.
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After three years of dating, he proposed to her in April 2022 on a beach in Malibu, presenting her with a stunning oval-cut diamond ring.
Kourtney is a model and entrepreneur with a massive social media following. She has 440,000 followers on TikTok and almost 700,000 on Instagram. She owns Kourtney by Kourtney Kellar, a company that sells 100 percent vegan self-tanning products.
Kourtney gained viral fame in September 2021 when she worked as a ring girl during Jake Paul’s boxing match against Tyron Woodley.
Isaiah Hartenstein’s Net Worth Details
As of 2026, Isaiah Hartenstein’s net worth stands at approximately $22.6 million. This figure comes primarily from his NBA salaries accumulated over eight seasons in the league, plus endorsement deals that add extra income.
Contract
Hartenstein signed a three-year, $87 million contract with the Oklahoma City Thunder in July 2024. The deal includes $58.5 million guaranteed in the first two seasons, with the final year structured as a club option.
The contract is decreasing, meaning his salary drops slightly each year. If the Thunder exercise their option for the 2026-27 season, Hartenstein will become an unrestricted free agent in 2027.
Salary
Hartenstein earns $30 million for the 2024-25 season with the Thunder. His salary drops to $28.5 million for the 2025-26 season, and the Thunder hold a team option for $28.5 million in 2026-27.
This represents a massive jump from his previous contracts. He made $9.2 million with the Knicks in 2023-24 and $7.8 million in 2022-23.
Career Earnings
| Season | Team | Salary |
|---|---|---|
| 2018-19 | Houston Rockets | $838,464 |
| 2019-20 | Houston Rockets | $1,416,852 |
| 2020-21 | Denver/Cleveland | $1,620,564 |
| 2021-22 | LA Clippers | $1,729,217 |
| 2022-23 | New York Knicks | $7,804,879 |
| 2023-24 | New York Knicks | $9,245,121 |
| 2024-25 | Oklahoma City Thunder | $30,000,000 |
| 2025-26 | Oklahoma City Thunder | $28,500,000 |
| 2026-27 | Oklahoma City Thunder | $28,500,000 |
Endorsements
Hartenstein signed an endorsement deal with Skechers in November 2025, becoming a brand ambassador for the footwear company.
The partnership includes marketing campaigns and a philanthropic component. He wears Skechers’ SKX NEXUS basketball shoes on the court, joining a roster that includes Joel Embiid and OG Anunoby.
Hartenstein explained his decision to partner with Skechers by saying they’re a brand doing things their own unique way, which he appreciates.
Career Stats
| Season | Team | Games | Minutes | Points | Rebounds | Assists | Steals | Blocks | FG% |
|---|---|---|---|---|---|---|---|---|---|
| 2018-19 | Houston | 28 | 221 | 53 | 47 | 15 | 7 | 12 | .488 |
| 2019-20 | Houston | 23 | 266 | 107 | 90 | 18 | 9 | 12 | .657 |
| 2020-21 | Denver/Cleveland | 46 | 559 | 236 | 181 | 55 | 19 | 39 | .550 |
| 2021-22 | LA Clippers | 68 | 1,216 | 563 | 332 | 160 | 50 | 77 | .626 |
| 2022-23 | New York | 82 | 1,628 | 406 | 536 | 102 | 53 | 64 | .535 |
| 2023-24 | New York | 75 | 1,896 | 582 | 626 | 188 | 87 | 85 | .644 |
| 2024-25 | Oklahoma City | 57 | 1,590 | 637 | 611 | 219 | 47 | 62 | .581 |
| 2025-26 | Oklahoma City | 11 | 331 | 147 | 130 | 36 | 16 | 7 | .685 |
| Career | 390 | 7,707 | 2,731 | 2,553 | 793 | 288 | 358 | .597 |
FAQs
1. How much does Isaiah Hartenstein make per year?
Hartenstein earns $30 million for the 2024-25 season with the Oklahoma City Thunder. His salary decreases to $28.5 million for the 2025-26 season, and the Thunder hold a team option worth $28.5 million for 2026-27.
2. Is Isaiah Hartenstein married?
Yes, Hartenstein married Kourtney Kellar on July 29, 2023, on a yacht in Newport Beach, California. The couple started dating after he sent her a message on Instagram. They got engaged in April 2022 on a Malibu beach and welcomed their son Elijah in May 2024.
3. Where did Isaiah Hartenstein grow up?
Hartenstein was born in Eugene, Oregon, but grew up primarily in Germany after his family moved there. His father Florian played professional basketball in Germany, and Isaiah spent his childhood and teenage years developing his skills in German youth basketball leagues before turning pro at 17.
4. How tall is Isaiah Hartenstein?
Hartenstein stands 7 feet 0 inches tall and weighs 250 pounds. His size combined with his mobility and passing ability makes him a valuable center who can defend multiple positions, protect the rim, and facilitate offense from the high post throughout games.
5. What teams has Isaiah Hartenstein played for?
Hartenstein has played for six NBA teams since 2017. He started with the Houston Rockets, then played for the Denver Nuggets, Cleveland Cavaliers, LA Clippers, and New York Knicks before signing with the Oklahoma City Thunder.
