NASB Financial, Inc. NEWS RELEASE Contact: Rhonda Nyhus Vice President NASB Financial, Inc. 12498 South 71 Highway Grandview, MO 64030 Phone (816) 765-2200 FOR IMMEDIATE RELEASE: NASB Financial, Inc. Announces Financial Results Grandview, Missouri (February 5, 2007) - NASB Financial, Inc. (NASDAQ: NASB) announced today net income for the quarter ended December 31, 2006, of $4,574,000 or $0.55 per share. This compares to net income of $5,666,000 or $0.68 per share for the quarter ended September 30, 2006, and compares to net income of $5,209,000 or $0.62 per share for the quarter ended December 31, 2005. The decrease in earnings for the quarter ended December 31, 2006, was primarily the result of continued pressure on the net interest margin and a difficult mortgage-lending environment. During the quarter ended December 31, 2006, the company paid a quarterly dividend on common stock of $0.225 per share. During the quarter ended December 31, 2005, the company paid a quarterly dividend on common stock of $0.225 per share and a special dividend of $0.225 per share. NASB Financial, Inc. is a unitary thrift holding company for North American Savings Bank, F.S.B. ("North American" or the "Bank"). North American operates five offices in greater Kansas City, Missouri and others in Harrisonville, St. Joseph, and Excelsior Springs, Missouri. The Bank also has loan origination offices in Lee's Summit and Springfield, Missouri as well as Overland Park and Leawood, Kansas. (Financial Highlights Schedule Attached) <page> <Table> <Caption> NASB Financial, Inc. Financial Highlights (Dollars in thousands, except per share data) Three months ended ------------------------------------- 12/31/06 9/30/06 12/31/05 ------------------------------------- EARNINGS DATA: Net interest income $ 10,699 11,109 12,260 Provision for loan losses 126 337 65 Non-interest income 5,495 6,740 5,841 Non-interest expense 8,629 8,298 9,897 Income tax expense 2,865 3,548 2,930 ------- ------- ------- Net income $ 4,574 5,666 5,209 ======= ======= ======= FINANCIAL CONDITION DATA: Total assets $ 1,559,654 1,524,796 1,552,886 Total loans and mortgage-backed and related securities 1,453,411 1,435,755 1,438,684 Customer and brokered deposit accounts 813,484 851,042 848,105 Stockholders' equity 159,532 156,572 149,578 FINANCIAL RATIOS AND PER SHARE DATA: Book value per share $ 19.18 18.82 17.77 Earnings per share 0.55 0.68 0.62 Cash dividends paid per share 0.225 0.225 0.45 Return on assets (annualized net income divided by total average assets) 1.19% 1.47% 1.34% Return on equity (annualized net income divided by average stockholder's equity) 11.58% 14.62% 13.96% Weighted average shares outstanding 8,318,642 8,437,664 8,434,562 </Table> <Page>