Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 2018

Banking and Thrift [Abstract]

Regulatory capital amounts and ratios

	Actual			For Capital Adequacy			To Be "Well-Capitalized"
(Dollars in Thousands)	Amount		Ratio	Amount		Ratio	Amount		Ratio
SECURITY FEDERAL CORP.	June 30, 2018
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	81,819	15.2%	$	32,381	6.0%	N/A		N/A
Total Risk-Based Capital (To Risk Weighted Assets)	88,586		16.4%	43,174		8.0%	N/A		N/A
Common Equity Tier 1 Capital (To Risk Weighted Assets)	76,819		14.2%	24,286		4.5%	N/A		N/A
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	81,819		9.3%	35,325		4.0%	N/A		N/A
SECURITY FEDERAL BANK
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	88,390	16.4%	$	32,372	6.0%	$	43,162	8.0%
Total Risk-Based Capital (To Risk Weighted Assets)	95,157		17.6%	43,162		8.0%	53,953		10.0%
Common Equity Tier 1 Capital (To Risk Weighted Assets)	88,390		16.4%	24,279		4.5%	35,069		6.5%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	88,390		10.0%	35,319		4.0%	44,148		5.0%
SECURITY FEDERAL CORP.	December 31, 2017
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	78,790	15.8%	$	29,998	6.0%	N/A		N/A
Total Risk-Based Capital (To Risk Weighted Assets)	85,066		17.0%	39,997		8.0%	N/A		N/A
Common Equity Tier 1 Capital (To Risk Weighted Assets)	73,790		14.8%	22,498		4.5%	N/A		N/A
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	78,790		9.1%	34,518		4.0%	N/A		N/A
SECURITY FEDERAL BANK
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	88,275	17.7%	$	29,989	6.0%	$	39,985	8.0%
Total Risk-Based Capital (To Risk Weighted Assets)	94,547		18.9%	39,985		8.0%	49,981		10.0%
Common Equity Tier 1 Capital (To Risk Weighted Assets)	88,275		17.7%	22,491		4.5%	32,488		6.5%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	88,275		10.2%	34,512		4.0%	43,140		5.0%