Cover Page - USD ($)	12 Months Ended
	Jun. 30, 2021	Aug. 21, 2021	Dec. 31, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jun. 30, 2021
Current Fiscal Year End Date	--06-30
Document Transition Report	false
Entity File Number	001-37709
Entity Registrant Name	AXOS FINANCIAL, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	33-0867444
Entity Address, Address Line One	9205 West Russell Road, Suite 400,
Entity Address, City or Town	Las Vegas,
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89148
City Area Code	858
Local Phone Number	649-2218
Title of 12(b) Security	Common stock, $.01 par value
Trading Symbol	AX
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,802,220,286
Entity Common Stock, Shares Outstanding		59,355,332
Documents Incorporated by Reference	Portions of the registrant’s definitive Proxy Statement for the registrant’s 2021 Annual Meeting of Stockholders are incorporated by reference into Part III.
Entity Central Index Key	0001299709
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false