Exhibit 99.1

FS Bancorp, Inc. Reports 2017 Results Including Record Net Income of $14.1 Million or $4.28 Per Diluted Share and Twentieth Consecutive Quarterly Dividend

MOUNTLAKE TERRACE, WA – January 25, 2018 – FS Bancorp, Inc. (NASDAQ:FSBW) (the “Company”), the holding company for 1st Security Bank of Washington (the “Bank”) today reported net income of $14.1 million, or $4.28 per diluted share for the year ended December 31, 2017, compared to net income of $10.5 million, or $3.51 per diluted share, for the same period last year. Net income for the fourth quarter of 2017 was $3.7 million, or $0.98 per diluted share, compared to $2.5 million, or $0.86 per diluted share for the fourth quarter ended December 31, 2016.

“The fourth quarter reflects continued loan growth funded by retail banking deposits,” stated Joe Adams, CEO of FS Bancorp, Inc. “I am also pleased to announce that our Board of Directors has approved our twentieth quarterly cash dividend of $0.11 per share.”  The dividend will be paid on February 21, 2018, to shareholders of record as of February 7, 2018.

CFO of FS Bancorp, Inc. Matthew Mullet stated, “In addition to loan growth, the Company sold $19.4 million of portfolio one-to-four-family loans as well as $2.0 million in U.S. Department of Agriculture loans in the fourth quarter to demonstrate our balance sheet liquidity.”

2017 Fourth Quarter and Year End Highlights

Balance Sheet and Credit Quality

Total assets decreased $12.1 million, or 1.2%, to $981.8 million at December 31, 2017, compared to $993.9 million at September 30, 2017, and increased $153.9 million, or 18.6%, from $827.9 million at December 31, 2016.  The quarter over sequential quarter decrease of $12.1 million in total assets included decreases in total cash and cash equivalents of $12.4 million, and loans held for sale (“HFS”) of $11.6 million, partially offset by increases in loans receivable, net of $7.7 million which is net of the $21.4 million in portfolio loan sales, and increases in securities available-for-sale (“AFS”) of $4.4 million.  The year over year increase of $153.9 million in total assets included increases in loans receivable, net of $168.2 million, certificates of deposit at other financial institutions of $2.9 million, accrued interest receivable of $1.0 million, and loans HFS of $910,000, partially offset by a decrease in total cash and cash equivalents of $17.5 million and servicing rights of $1.7 million.  These increases in assets year over year were primarily funded by growth in deposits and net proceeds from the underwritten public offering in the third quarter of 2017.

Loans receivable, net increased $7.7 million to $761.6 million at December 31, 2017, from $753.9 million at September 30, 2017, and increased $168.2 million from $593.3 million at December 31, 2016.  The increase in loans receivable, net quarter over sequential quarter was primarily a result of increases in real estate and consumer loans, partially offset by a decline in commercial business loans.  Total real estate loans increased $9.9 million including increases in construction and development loans of $13.7 million, home equity loans of $1.3 million, and multi-family loans of $1.0 million, partially offset by a decrease in one-to-four-family portfolio loans of $6.5 million which is net of the $19.4 million loan sale.  Total commercial business loans decreased $9.0 million primarily from a decrease in residential warehouse lending of $9.1 million associated with seasonal paydowns.  Total consumer loans increased $7.0 million primarily from growth of $5.8 million in indirect home improvement loans and $967,000 in solar loans.

One-to-four-family loans originated through the home lending segment which includes loans HFS, loans held for investment, fixed seconds, and loans brokered to other institutions decreased $35.5 million, or 14.5%, to $208.6 million during the quarter ended December 31, 2017, compared to $244.1 million for the preceding quarter, and increased from $187.8 million for the same quarter one year ago. Originations of one-to-four-family loans to purchase a home (purchase production) increased by $109.1 million, or 21.2% with $624.3 million in loan purchase production closing during the year ended December 31, 2017, up from $515.2 million for the year ended December 31, 2016.  One-to-four-family loan originations for refinance (refinance production) decreased $77.5 million, or 29.3% with $186.9 million in refinance production closing during the year ended December 31, 2017, down from $264.4 million for the year ended December 31, 2016.  During the quarter ended December 31, 2017, the Company sold $206.2 million of one-to-four-family loans including the $19.4 million in portfolio loans, compared to sales of $204.3 million for the preceding quarter, and sales of $195.5 million for the same quarter one year ago.

Purchase production was 75.8% of the total one-to-four-family loan originations versus 24.2% for refinance production during the fourth quarter of 2017, compared to 63.3% in purchase production versus 36.7% in refinance production during the same period in 2016.  Purchase production for the year ended December 31, 2017 was 77.0% of the total one-to-four-family loan originations versus 23.0% for refinance production, compared to 66.1% in purchase volume versus 33.9% in refinances for the year ended December 31, 2016.  The increase in purchase production and corresponding decrease in refinance production reflects management’s focus on residential home buyers in the markets we serve. 

The allowance for loan and lease losses (“ALLL”) at December 31, 2017 increased to $10.8 million, or 1.4% of gross loans receivable, excluding loans HFS, compared to $10.6 million, or 1.4% of gross loans receivable, excluding loans HFS at September 30, 2017, and $10.2 million, or 1.7% of gross loans receivable, excluding loans HFS, at December 31, 2016.  Non-performing loans, consisting of non-accrual loans, decreased to $1.0 million at December 31, 2017, from $1.3 million at September 30, 2017, and increased from $721,000 at December 31, 2016.  Substandard loans decreased to $6.5 million at December 31, 2017, compared to $6.6 million at September 30, 2017, and decreased from $8.0 million at December 31, 2016.  The $1.5 million decrease in substandard loans from one year ago was primarily due to the sale of a shared national credit of $1.9 million of which a slight discount to

book value was charged off against the ALLL in the third quarter of 2017.  There was no other real estate owned (“OREO”) at December 31, 2017, at September 30, 2017, or at December 31, 2016.

Total deposits decreased $10.7 million, to $829.8 million at December 31, 2017, compared to $840.6 million at September 30, 2017, and increased $117.2 million, from $712.6 million at December 31, 2016.  Relationship-based transactional deposits increased $24.0 million, to $306.8 million at December 31, 2017, from $282.7 million at September 30, 2017, and increased $87.7 million, from $219.0 million at December 31, 2016.  Money market and savings accounts decreased $8.2 million, to $300.8 million at December 31, 2017, from $309.0 million at September 30, 2017, and increased $3.0 million, from $297.8 million at December 31, 2016.  Time deposits decreased $26.6 million, to $222.3 million at December 31, 2017, from $248.8 million at September 30, 2017, and increased $26.5 million, from $195.7 million at December 31, 2016.  The quarter over sequential quarter decrease in time deposits was primarily from the maturity of $32.9 million in brokered deposits during the fourth quarter. 

Non-retail certificates of deposit which includes brokered certificates of deposit, online certificates of deposit, and public funds decreased $33.2 million to $66.5 million at December 31, 2017, compared to $99.7 million at September 30, 2017, as a result of the maturity of the brokered deposits discussed above, and increased $6.3 million from $60.2 million at December 31, 2016.  Management remains focused on growth in lower cost relationship-based deposits to fund long term asset growth.

At December 31, 2017, borrowings decreased $2.7 million, or 26.7%, to $7.5 million, from $10.3 million at September 30, 2017, and decreased $5.1 million, or 40.6%, from $12.7 million at December 31, 2016, the year over year decrease was primarily due to the repayment of FHLB fixed rate advances from growth in retail deposits.

Total stockholders’ equity increased $3.8 million, to $122.0 million at December 31, 2017, from $118.2 million at September 30, 2017, and increased $41.0 million, from $81.0 million at December 31, 2016.  The increase in stockholders’ equity from the third quarter of 2017 was primarily due to net income of $3.7 million, and the increase from December 31, 2016 was primarily from net proceeds of $25.6 million from the underwritten public offering and 2017 net income of $14.1 million.  Book value per common share was $34.47 at December 31, 2017, compared to $33.52 at September 30, 2017, and $28.32 at December 31, 2016.

The Bank is well capitalized under the minimum capital requirements established by the FDIC with a total risk-based capital ratio of 16.3%, a Tier 1 leverage capital ratio of 12.6%, and a common equity Tier 1 (“CET1”) capital ratio of 15.0% at December 31, 2017.  At December 31, 2016, the total risk-based capital ratio was 13.9%, the Tier 1 leverage capital ratio was 10.3%, and the CET1 capital ratio was 12.6%.

The Company exceeded all regulatory capital requirements with a total risk-based capital ratio of 15.7%, a Tier 1 leverage capital ratio of 12.1%, and a CET1 ratio of 14.5% at December 31, 2017, compared to 12.9%, 9.5%, and 11.6% at December 31, 2016, respectively.

Operating Results

Net interest income increased $2.1 million, or 22.8%, to $11.3 million for the three months ended December 31, 2017, from $9.2 million for the three months ended December 31, 2016, primarily due to a $2.2 million, or 22.7% increase in loans receivable interest income. Net interest income increased $7.4 million, or 21.8% to $41.2 million for the year ended December 31, 2017, from $33.9 million for the year ended December 31, 2016, primarily due to a $7.7 million, or 21.5% increase in loans receivable interest income.

The net interest margin (“NIM”) increased six basis points to 4.72% for the three months ended December 31, 2017, from 4.66% for the same period in the prior year, and increased 22 basis points to 4.65% for the year ended December 31, 2017, from 4.43% for the year ended December 31, 2016.  The increased NIM reflects growth in higher yielding loans, and reductions in securities AFS and cash and cash equivalents.  The average cost of funds increased six basis points to 0.64% for the three months ended December 31, 2017, from 0.58% for the three months ended December 31, 2016, and increased two basis points to 0.61% for the year ended December 31, 2017, from 0.59% the year ended December 31, 2016.  Management remains focused on matching deposit duration with the duration of earning assets where appropriate.

For the three months ended December 31, 2017, the provision for loan losses was $300,000, compared to $600,000 for the three months ended December 31, 2016. During the three months ended December 31, 2017, net charge-offs totaled $143,000 compared to net recoveries of $25,000 during the three months ended December 31, 2016. The provision for loan losses was $750,000 for the year ended December 31, 2017, compared to $2.4 million for the year ended December 31, 2016.  Net charge-offs totaled $205,000 during the year ended December 31, 2017, compared to net recoveries of $26,000 during the year ended December 31, 2016.  The decrease in the provision for loan losses for the three months ended and year ended December 31, 2017 was primarily a result of the relatively low levels of charge-offs, delinquencies, nonperforming and classified loans, as well as the increasing percentage of real estate loans compared to consumer loans and improving real estate values in our market areas reducing the increase in the provision for loan losses required for loan growth.

Noninterest income decreased $175,000, or 3.2%, to $5.3 million for the three months ended December 31, 2017, from $5.4 million for the three months ended December 31, 2016.  The decrease during the period was primarily due to a $191,000 reduction in gain on sale of loans.  Noninterest income increased $505,000, or 2.1%, to $24.1 million for the year ended December 31, 2017, from $23.6 million for the year ended December 31, 2016.  The

increase during the year was primarily due to increases in the gain on sale of investment securities of $234,000, in service charges and fee income of $157,000, and in other noninterest income of $133,000.  The $1.1 million gain on sale of servicing rights transacted in the second quarter of 2017 helped offset the decrease in gain on sale of loans of $1.1 million, mainly associated with a reduction of gain on sale margins associated with the product mix in the Pacific Northwest.  There was no sale of mortgage servicing rights in 2016.

Noninterest expense increased $998,000, or 9.9%, to $11.1 million for the three months ended December 31, 2017, from $10.1 million for the three months ended December 31, 2016.  The increase in noninterest expense was primarily a result of a $949,000 increase in salaries and benefits, which included $464,000 in incentives and commissions for the loan production staff associated with continued strong loan production growth, and $207,000 of increased ESOP expense from our strong stock performance.

Noninterest expense increased $5.1 million, or 13.0%, to $44.0 million for the year ended December 31, 2017, from $38.9 million for the year ended December 31, 2016. The increase in noninterest expense was primarily a result of a $4.6 million increase in salaries and benefits, which included $1.4 million in incentives and commissions for the loan production staff, $593,000 of increased ESOP expense due to the significant increase in our stock price over the last year, an increase of $387,000 data processing expense, $268,000 in occupancy expense, $205,000 in expenses related to operations, and $147,000 in loan costs.  These increased expenses were partially offset by a $389,000 decrease in acquisition costs, a $246,000 decrease in professional and board fees. There was no gain on the sale of OREO in the current year to offset the increase in expenses as compared to $150,000 last year.

About FS Bancorp

FS Bancorp, Inc., a Washington corporation, is the holding company for 1st Security Bank of Washington.  The Bank provides loan and deposit services to customers who are predominantly small and middle-market businesses and individuals in western Washington through its 11 branches and seven loan production offices in various suburban communities in the greater Puget Sound area, and one loan production office in the market area of the Tri-Cities.  The Bank services home mortgage customers throughout Washington State with an emphasis in the Puget Sound and Tri-Cities home lending markets.

Forward-Looking Statements

When used in this press release and in other documents filed with or furnished to the Securities and Exchange Commission (the “SEC”), in press releases or other public stockholder communications, or in oral statements made with the approval of an authorized executive officer, the words or phrases “believe,” “will,” “will likely result,” “are expected to,” “will continue,” “is anticipated,” “estimate,” “project,” “plans,” or similar expressions are intended to identify “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward‑looking statements are not historical facts but instead represent management's current expectations and forecasts regarding future events, many of which are inherently uncertain and outside of our control.  Actual results may differ, possibly materially from those currently expected or projected in these forward-looking statements. Factors that could cause our actual results to differ materially from those described in the forward-looking statements, include but are not limited to, the following: increased competitive pressures; changes in the interest rate environment; changes in general economic conditions and conditions within the securities markets; our ability to execute our plans to grow our residential construction lending, our mortgage banking operations, our warehouse lending, and the geographic expansion of our indirect home improvement lending; our ability to successfully integrate any assets, liabilities, customers, systems, and management personnel we may acquire into our operations and our ability to realize related revenue synergies and expected cost savings and other benefits within the anticipated time frames or at all; secondary market conditions for loans and our ability to sell loans in the secondary market; legislative and regulatory changes; and other factors described in the Company’s latest Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, and other filings with the Securities and Exchange Commission which are available on our website at www.fsbwa.com and on the SEC's website at www.sec.gov.  Any of the forward-looking statements that we make in this press release and in the other public statements are based upon management's beliefs and assumptions at the time they are made and may turn out to be wrong because of the inaccurate assumptions we might make, because of the factors illustrated above or because of other factors that we cannot foresee. Therefore, these factors should be considered in evaluating the forward‑looking statements, and undue reliance should not be placed on such statements. We do not undertake and specifically disclaim any obligation to revise any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date of such statements. These risks could cause our actual results for 2018 and beyond to differ materially from those expressed in any forward-looking statements made by, or on behalf of us and could negatively affect our operating and stock performance.

FS BANCORP, INC. AND SUBSIDIARY

CONSOLIDATED BALANCE SHEETS

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FS BANCORP, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF INCOME

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