Minimum Capital Requirements (Tables)

3 Months Ended

Mar. 31, 2025

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Actual and Required Capital Amounts and Ratios

Actual and required capital amounts and ratios are included below as of the dates indicated.

March 31, 2025	Actual				Minimum Requirement for Capital Adequacy with Capital Buffer				To Qualify as Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
Total Capital (to risk-weighted assets)
FB Financial Corporation	$	1,739,703	15.2	%	$	1,202,607	10.5	%	N/A		N/A
FirstBank	1,677,611		14.8	%	1,191,615		10.5	%	$	1,134,871	10.0	%
Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,496,448	13.1	%	$	973,539	8.5	%	N/A		N/A
FirstBank	1,435,648		12.7	%	964,640		8.5	%	$	907,897	8.0	%
Common Equity Tier 1 Capital    (to risk-weighted assets)
FB Financial Corporation	$	1,466,448	12.8	%	$	801,738	7.0	%	N/A		N/A
FirstBank	1,435,648		12.7	%	794,410		7.0	%	$	737,666	6.5	%
Tier 1 Capital (to average assets)
FB Financial Corporation	$	1,496,448	11.4	%	$	523,095	4.0	%	N/A		N/A
FirstBank	1,435,648		11.0	%	521,397		4.0	%	$	651,746	5.0	%

December 31, 2024	Actual				Minimum Requirement for Capital Adequacy with Capital Buffer				To Qualify as Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
Total Capital (to risk-weighted assets)
FB Financial Corporation	$	1,721,941	15.2	%	$	1,187,163	10.5	%	N/A		N/A
FirstBank	1,650,305		14.7	%	1,175,095		10.5	%	$	1,119,138	10.0	%
Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,480,722	13.1	%	$	961,037	8.5	%	N/A		N/A
FirstBank	1,410,505		12.6	%	951,267		8.5	%	$	895,310	8.0	%
Common Equity Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,450,722	12.8	%	$	791,442	7.0	%	N/A		N/A
FirstBank	1,410,505		12.6	%	783,397		7.0	%	$	727,440	6.5	%
Tier 1 Capital (to average assets)
FB Financial Corporation	$	1,480,722	11.3	%	$	522,557	4.0	%	N/A		N/A
FirstBank	1,410,505		10.8	%	521,538		4.0	%	$	651,923	5.0	%
Note: December 31, 2024 represents the final year of the 5-year CECL adoption phase out with 25% of the initial impact of CECL adoption being adjusted out of regulatory capital calculations.