Details emerge on 49ers tackle Colton McKivitz’s contract extension 

The San Francisco 49ers have locked in Colton McKivitz through 2028, signing the right tackle to a three-year, $45 million contract extension this week. Pro Football Talk's Mike Florio revealed the deal details, which include $27 million guaranteed.

Here's a year-by-year breakdown of the 49ers' commitment to McKivitz, per Florio:

• Base salary: $1.17 million (fully guaranteed)
• Per-game active roster bonus: $510,000 total (fully guaranteed if earned)
• Signing bonus: $6.8 million (prorated over the contract for cap purposes)

• Option bonus: $8.185 million (fully guaranteed)
• Workout bonus: $150,000 (fully guaranteed if earned)
• Base salary: $1.215 million (fully guaranteed)
• Per-game active roster bonus: $680,000 total (fully guaranteed if earned)

• Option bonus: $12.67 million ($8.29 million guaranteed for injury; $6.29 million becomes fully guaranteed April 1, 2026; additional $2 million guaranteed April 1, 2027)
• Workout bonus: $150,000
• Base salary: $1.5 million
• Per-game active roster bonus: $680,000 total

• Option bonus: $6.8 million
• Workout bonus: $150,000
• Base salary: $7.36 million
• Per-game active roster bonus: $680,000 total

• Length: Three-year extension (2025–2028, counting original contract year)
• Total value: $45 million
• Guaranteed for injury: $27 million
• Fully guaranteed by April 1, 2026: $25 million

The 49ers selected McKivitz in the fifth round out of West Virginia in 2020. He became a full-time starter in 2023 and has appeared in 63 games with 40 starts in his NFL career. McKivitz was initially scheduled to become a free agent in 2026.