Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2017

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.	September 30, 2017
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	77,970	15.5%	$	30,227	6.0%	N/A		N/A
Total Risk-Based Capital (To Risk Weighted Assets)	84,289		16.7%	40,303		8.0%	N/A		N/A
Common Equity Tier 1 Capital (To Risk Weighted Assets)	72,970		14.5%	22,670		4.5%	N/A		N/A
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	77,970		9.1%	34,398		4.0%	N/A		N/A
SECURITY FEDERAL BANK
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	88,802	17.6%	$	30,218	6.0%	$	40,290	8.0%
Total Risk-Based Capital (To Risk Weighted Assets)	95,121		18.9%	40,290		8.0%	50,363		10.0%
Common Equity Tier 1 Capital (To Risk Weighted Assets)	88,802		17.6%	22,663		4.5%	32,736		6.5%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	88,802		10.3%	34,393		4.0%	42,992		5.0%
SECURITY FEDERAL CORP.	December 31, 2016
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	73,787	16.6%	$	26,714	6.0%	N/A		N/A
Total Risk-Based Capital (To Risk Weighted Assets)	79,383		17.8%	35,618		8.0%	N/A		N/A
Common Equity Tier 1 Capital (To Risk Weighted Assets)	68,787		15.4%	20,035		4.5%	N/A		N/A
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	73,787		9.1%	32,548		4.0%	N/A		N/A
SECURITY FEDERAL BANK
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$	88,139	19.8%	$	26,694	6.0%	$	35,592	8.0%
Total Risk-Based Capital (To Risk Weighted Assets)	93,735		21.1%	35,592		8.0%	44,490		10.0%
Common Equity Tier 1 Capital (To Risk Weighted Assets)	88,139		19.8%	20,021		4.5%	28,919		6.5%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	88,139		10.8%	32,587		4.0%	40,734		5.0%