WEX Second Quarter 2019 Earnings August 1, 2019

WEX Forward-Looking Statements This earnings presentation contains forward-looking statements, including statements regarding: financial guidance; assumptions underlying the Company's financial guidance; future growth opportunities and expectations; profitability; technology advances; and, market expansion. Any statements that are not statements of historical facts may be deemed to be forward-looking statements. When used in this earnings presentation and the discussion accompanying it, the words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “project” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such words. These forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to differ materially, including: the effects of general economic conditions on fueling patterns as well as payment and transaction processing activity; the impact of foreign currency exchange rates on the Company’s operations, revenue and income; changes in interest rates; the impact of fluctuations in fuel prices; the effects of the Company’s business expansion and acquisition efforts; potential adverse changes to business or employee relationships, including those resulting from the completion of an acquisition; competitive responses to any acquisitions; uncertainty of the expected financial performance of the combined operations following completion of an acquisition; the failure to successfully integrate the Company's acquisitions; the ability to realize anticipated synergies and cost savings; unexpected costs, charges or expenses resulting from an acquisition; the Company's ability to successfully acquire, integrate, operate and expand commercial fuel card programs; the failure of corporate investments to result in anticipated strategic value; the impact and size of credit losses; the impact of changes to the Company's credit standards; breaches of the Company’s technology systems or those of the Company's third-party service providers and any resulting negative impact on the Company's reputation, liabilities or relationships with customers or merchants; the Company’s failure to maintain or renew key commercial agreements; failure to expand the Company’s technological capabilities and service offerings as rapidly as the Company’s competitors; failure to successfully implement the Company's information technology strategies and capabilities in connection with its technology outsourcing and insourcing arrangements and any resulting cost associated with that failure; the actions of regulatory bodies, including banking and securities regulators, or possible changes in banking or financial regulations impacting the Company’s industrial bank, the Company as the corporate parent or other subsidiaries or affiliates; the impact of the material weaknesses disclosed in Item 9A of the Company's annual report on Form 10-K for the year ended December 31, 2018 and in item 4 of the Company's quarterly report on Form 10-Q for the quarter ended March 31, 2019 and the effects of the Company's investigation and remediation efforts in connection with certain immaterial errors in the financial statements of our Brazilian subsidiary; the impact of the Company’s outstanding notes on its operations; the impact of increased leverage on the Company's operations, results or borrowing capacity generally, and as a result of acquisitions specifically; the incurrence of impairment charges if our assessment of the fair value of certain of our reporting units changes; the uncertainties of litigation; as well as other risks and uncertainties identified in Item 1A of our Annual Report for the year ended December 31, 2018 filed on Form 10-K with the Securities and Exchange Commission on March 18, 2019 and amended on March 20, 2019. The Company's forward-looking statements do not reflect the potential future impact of any alliance, merger, acquisition, disposition or stock repurchases. The forward-looking statements speak only as of the date of this earnings presentation and undue reliance should not be placed on these statements. The Company disclaims any obligation to update any forward-looking statements as a result of new information, future events or otherwise.Non-GAAP Information:For additional important information and disclosure regarding our use of non-GAAP metrics, specifically adjusted net income, please see our most recent earnings release, issued on August 1, 2019. See the Appendix to this presentation for an explanation and reconciliation of non-GAAP adjusted net income (or "adjusted net income" or “ANI”) to GAAP net income, ANI per diluted share to GAAP net income per diluted share, and adjusted operating margin to GAAP operating margin.

2Q2019 Highlights Fleet Travel & Corporate Health & Employee Benefits Up 19% Up 10% Up 8% 2Q2019 Segment Revenue Growth Vs. 2Q2018 +55% +21% +11% US Healthcare up 72%

Strategic Pillars HIGHLIGHTS FOR THE QUARTER Revenue growth of 19% with double-digit growth in each of the segmentsTransition of Shell and Chevron portfolios completedCompleted acquisition of Go Fuel Card in Europe on July 1Clearview Snap analytics now in use at more than 8,000 customersDriver Dash mobile payment app extended to 25,000 locations in the USImpressive corporate payments volume growth of more than 50%Robust enrollment season continues to contribute to strong revenue growth in US Health businessGlobal Leadership Summit held with a focus on leadership training and development

Executing on the WEX Strategy FLEET TRAVEL & CORPORATE HEALTH & EMPLOYEE BENEFITS Chevron portfolio conversion completedDriver Dash live at ExxonMobil and Shell locations Closed acquisition of fuel card business from EG Group in EuropeMore than 8,000 customers using Clearview analytics platformDigital marketing optimization to better reach potential customers Progress on Noventis integrationIssuing Visa commercial virtual cards in the US and UK in USD, GBP and EURCreated ability to manage customer credit lines across schemes, processors and entitiesOptimized new UI for mobile transactions enhancing and modernizing experience for both direct clients and partners Mobile app quick receipt upload for all CDH account typesImprovements to COBRA member portal for open enrollmentBusiness Intelligence enhancements for administrator dashboard LEADING WITH SUPERIOR PRODUCTS AND TECHNOLOGY BUILDING UPON OUR BEST-IN-CLASS GROWTH ENGINE

WEX Second Quarter 2019 Financial Results

Company Results - Q2 2019 2Q19 2Q18 $ ∆ Yr/Yr % ∆ Yr/Yr Total Revenue $441,807 $370,798 $71,009 19.2% Net income attributable to shareholders $13,807 $38,424 $(24,617) (64.1)% Net income attributable to WEX Inc. per diluted share $0.32 $0.88 $(0.56) (63.6)% Adjusted net income attributable to shareholders $99,636 $89,958 $9,678 10.8% Adjusted net income attributable to shareholders per diluted share $2.28 $2.07 $0.21 10.0% Second quarter results building a solid foundation for remainder of the year In thousands except per share data

Revenue Breakdown - Q2 2019 2Q19 2Q18 $ ∆ Yr/Yr % ∆ Yr/Yr Total Revenue $441,807 $370,798 $71,009 19.2% Segment Revenue Fleet Solutions $267,314 $241,412 $25,902 10.7% Travel and Corporate Solutions $91,350 $75,764 $15,586 20.6% Health and Employee Benefit Solutions $83,143 $53,622 $29,521 55.1% Double digit revenue growth rate for all Segments In thousands unless otherwise noted

Fleet Solutions 2Q19 2Q18 $ ∆ Yr/Yr % ∆ Yr/Yr Total Segment Revenue ($) 267,314 241,412 25,902 10.7% Payment Processing Revenue ($) 120,717 112,895 7,822 6.9% Finance Fee Revenue ($) 62,385 45,188 17,197 38.1% All Other Revenue ($) 84,212 83,329 883 1.1% Payment Processing Transactions 127,986 115,919 12,067 10.4% Net Payment Processing Rate (%) 1.24% 1.19% 0.05% 4.0% Average US Fuel Price ($/gallon) $2.91 $3.02 $(0.11) (3.6)% Net Late Fee Rate (%) 0.54% 0.38% 0.16% 42.5% Strength in North America Fuel Business In thousands unless otherwise noted

Travel and Corporate Solutions 2Q19 2Q18 $ ∆ Yr/Yr % ∆ Yr/Yr Total Segment Revenue ($) 91,350 75,764 15,586 20.6% Payment Processing Revenue ($) 77,273 51,289 25,984 50.7% All Other Revenue ($) 14,077 24,475 (10,398) (42.5)% Purchase Volume ($) 10,047,934 8,930,421 1,117,513 12.5% Net Interchange Rate (%) 0.77% 0.57% 0.20% 34.9% Corporate payments growth and acquisition of Noventis drive strong revenue growth In thousands unless otherwise noted

Health and Employee Benefit Solutions 2Q19 2Q18 $ ∆ Yr/Yr % ∆ Yr/Yr Total Segment Revenue ($) 83,143 53,622 29,521 55.1% Payment Processing Revenue ($) 16,836 14,554 2,282 15.7% Account Servicing Revenue ($) 54,669 26,702 27,967 104.7% All Other Revenue ($) 11,638 12,366 (728) (5.9)% Purchase Volume * ($) 1,374,592 1,253,309 121,283 9.7% Average Number of SaaS Accounts* 12,563 10,745 1,818 16.9% Strong US Health revenue growth bolstered by acquisition of Discovery Benefits In thousands unless otherwise noted* US Only

Selected Operating Expenses and Margins Processing costs are up mainly due to acquisitions and increased volumeFleet credit loss was 13.9 basis points from 11.2 G&A up due to stock comp, debt restructuring and M&A activitySales and marketing expenses up mainly due to Shell/Chevron, acquisitions and partner rebates (In thousands) 2Q19 2Q19 2Q18 2Q18 $ ∆ Yr/Yr $ ∆ Yr/Yr % ∆ Yr/Yr Processing costs $ 99,481 $ 77,483 $ 21,998 28.4 % Service fees $ 14,197 $ 13,809 $ 388 2.8 % Provision for credit losses $ 14,832 $ 13,636 $ 1,196 8.8 % Operating interest $ 10,693 $ 9,528 $ 1,165 12.2 % General and administrative $ 76,247 $ 47,589 $ 28,658 60.2 % Sales and marketing $ 72,831 $ 57,697 $ 15,134 26.2 % 2Q19 2Q18 ∆ Yr/Yr in basis points GAAP operating income margin 21.4% 27.1% (570) Non-GAAP adjusted operating income margin 37.7% 38.8% (110) Operating and Adjusted Operating Income Margins Cost of services Selling general and administrative Selected Operating Expenses (GAAP)

Tax Rate Key Updates ANI tax rate in line with the prior year

Additional Balance Sheet Items Key Updates Corporate cash1 balance was $357 million Available borrowing capacity of $720 million on line of creditIncreased capacity and extended Term B maturity in May 2019Leverage ratio 3.8XSignificant mitigation of interest rate risk - approximately 65% of Financing Debt at effectively fixed rates 1 Corporate cash is calculated in accordance with the terms of our consolidated leverage ratio in the Company’s amended 2016 Credit Agreement as filed with the SEC2 Total financing debt includes Term A, Term B, Notes and $50 million deferred payment for DBI acquisition which will paid Jan 2020

Guidance 3Q2019 OUTLOOK ∆ Yr/Yr FY2019 OUTLOOK ∆ Yr/Yr Revenue (in millions) $455 - $465 18% - 20% $1,720 - $1,750 16% - 18% Adjusted Net Income1 (in millions) $110 - $115 13% - 18% $399 - $410 12% - 15% Adjusted Net Income Earnings per Diluted Share1 $2.52 - $2.62 13% - 17% $9.10 - $9.35 11% - 14% Domestic Fuel Prices ($ / Gallon) $2.72 $2.72 Fleet Credit Loss (Basis Points) 13 - 18 13 - 18 Adjusted Net Income Tax Rate 24.5% - 25.5% 24.5% - 25.5% Number of Shares Outstanding 43.8 million 43.8 million 1 The Company's adjusted net income guidance, which is a non-GAAP measure, excludes unrealized gains and losses on financial instruments, net foreign currency remeasurement gains and losses, acquisition related intangible amortization, other acquisition and divestiture related items, stock-based compensation, other costs, debt restructuring and debt issuance cost amortization, similar adjustments attributable to our non-controlling interests and certain tax related items. We are unable to reconcile our adjusted net income guidance to the comparable GAAP measure without unreasonable effort because of the difficulty in predicting the amounts to be adjusted, including but not limited to, foreign currency exchange rates, unrealized gains and losses on derivative instruments, acquisition and divestiture related items and adjustments to the redemption value of a non-controlling interest, which may have a significant impact on our financial results. Strong business execution partially offset by lower average fuel prices and unfavorable foreign exchange rates

Appendix

Three Months Ended June 30, Three Months Ended June 30, Six Months Ended June 30, Six Months Ended June 30, (In thousands) 2019 2019 2018 2018 2019 2019 2018 2018 Net income attributable to shareholders $ 13,807 $ 38,424 $ 29,941 $ 90,394 Unrealized loss (gain) on financial instruments 21,516 (2,706 ) 33,428 (16,214 ) Net foreign currency remeasurement (gain) loss (6,665 ) 26,734 (2,780 ) 26,344 Acquisition-related intangible amortization 39,814 34,921 73,702 70,157 Other acquisition and divestiture related items 7,017 619 16,797 1,256 Stock-based compensation 14,992 6,905 25,434 15,860 Other costs 4,746 630 7,501 6,301 Debt restructuring and debt issuance cost amortization 8,453 2,607 14,949 9,299 ANI adjustments attributable to non-controlling interests 17,298 (186 ) 16,725 (538 ) Tax related items (21,342 ) (17,990 ) (41,237 ) (30,883 ) Adjusted net income attributable to shareholders $ 99,636 $ 89,958 $ 174,460 $ 171,976 WEX Non-GAAP Reconciliation

WEX Non-GAAP Reconciliation Three Months Ended June 30, Three Months Ended June 30, Six Months Ended June 30, Six Months Ended June 30, (In thousands) 2019 2019 2018 2018 2019 2019 2018 2018 Operating income (GAAP) $ 94,737 $ 100,424 $ 163,672 $ 184,283 Acquisition-related intangible amortization 39,814 34,921 73,702 70,157 Other acquisition and divestiture related items 7,017 619 16,797 1,256 Debt restructuring 5,078 466 9,478 3,481 Stock-based compensation 14,992 6,905 25,434 15,860 Other costs 4,746 630 7,501 6,301 Adjusted operating income (Non-GAAP) $ 166,384 $ 143,965 $ 296,584 $ 281,338 Three Months Ended June 30, Three Months Ended June 30, Six Months Ended June 30, Six Months Ended June 30, (In thousands except margin data) 2019 2019 2018 2018 2019 2019 2018 2018 Operating income (GAAP) $ 94,737 $ 100,424 $ 163,672 $ 184,283 Total Revenue $ 441,807 $ 370,798 $ 823,683 $ 724,826 Operating income margin (GAAP) 21.4 % 27.1 % 19.9 % 25.4 % Adjusted operating income (Non-GAAP) $ 166,384 $ 143,965 $ 296,584 $ 281,338 Total Revenue $ 441,807 $ 370,798 $ 823,683 $ 724,826 Adjusted operating income margin (Non-GAAP) 37.7 % 38.8 % 36.0 % 38.8 %

WEX Non-GAAP Reconciliation The Company's non-GAAP adjusted net income excludes unrealized gains and losses on financial instruments, net foreign currency remeasurement gains and losses, acquisition-related intangible amortization, other acquisition and divestiture related items, stock-based compensation, other costs, debt restructuring and debt issuance cost amortization, similar adjustments attributable to our non-controlling interests and certain tax related items. The Company's non-GAAP adjusted operating income excludes acquisition-related intangible amortization, other acquisition and divestiture related items, stock-based compensation, other costs, and debt restructuring costs. Total segment adjusted operating income incorporates the same adjustments and further excludes unallocated corporate expenses.Although adjusted net income, adjusted operating income and total segment adjusted operating income are not calculated in accordance with U.S. generally accepted accounting principles (“GAAP”), these non-GAAP measures are integral to the Company's reporting and planning processes and the chief operating decision maker of the Company uses segment adjusted operating income to allocate resources among our operating segments. The Company considers these measures integral because they exclude the above-specified items that the Company's management excludes in evaluating the Company's performance. Specifically, in addition to evaluating the Company's performance on a GAAP basis, management evaluates the Company's performance on a basis that excludes the above items because:Exclusion of the non-cash, mark-to-market adjustments on financial instruments, including interest rate swap agreements and investment securities, helps management identify and assess trends in the Company's underlying business that might otherwise be obscured due to quarterly non-cash earnings fluctuations associated with these financial instruments. Net foreign currency gains and losses primarily result from the remeasurement to functional currency of cash, receivable and payable balances, certain intercompany notes denominated in foreign currencies and any gain or loss on foreign currency hedges relating to these items. The exclusion of these items helps management compare changes in operating results between periods that might otherwise be obscured due to currency fluctuations.The Company considers certain acquisition-related costs, including certain financing costs, investment banking fees, warranty and indemnity insurance, certain integration related expenses and amortization of acquired intangibles, as well as gains and losses from divestitures to be unpredictable, dependent on factors that may be outside of our control and unrelated to the continuing operations of the acquired or divested business or the Company. In addition, the size and complexity of an acquisition, which often drives the magnitude of acquisition-related costs, may not be indicative of such future costs. The Company believes that excluding acquisition-related costs and gains or losses of divestitures facilitates the comparison of our financial results to the Company's historical operating results and to other companies in our industry.Stock-based compensation is different from other forms of compensation as it is a non-cash expense. For example, a cash salary generally has a fixed and unvarying cash cost. In contrast, the expense associated with an equity-based award is generally unrelated to the amount of cash ultimately received by the employee, and the cost to the Company is based on a stock-based compensation valuation methodology and underlying assumptions that may vary over time.Other costs includes other immaterial costs that the Company has incurred and are non-operational and non-recurring. We exclude these items when evaluating our continuing business performance as such items are not consistently occurring and do not reflect expected future operating expense, nor do they provide insight into the fundamentals of current or past operations of our business. This also includes costs related to certain identified initiatives to further streamline the business, improve the Company's efficiency, create synergies and globalize the Company's operations, remediate the prior year material weaknesses, all with an objective to improve scale and efficiency and increase profitability going forward. Debt restructuring and debt issuance cost amortization are unrelated to the continuing operations of the Company. Debt restructuring costs are not consistently occurring and do not reflect expected future operating expense, nor do they provide insight into the fundamentals of current or past operations of our business. In addition, since debt issuance cost amortization is dependent upon the financing method which can vary widely company to company, we believe that excluding these costs helps to facilitate comparison to historical results as well as to other companies within our industry.The adjustments attributable to non-controlling interests, including adjustments to the redemption value of a non-controlling interest, have no significant impact on the ongoing operations of the business.The tax related items are the difference between the Company’s U.S. GAAP tax provision and a pro forma tax provision based upon the Company’s adjusted net income before taxes as well as the impact from certain discrete tax items. The methodology utilized for calculating the Company’s adjusted net income tax provision is the same methodology utilized in calculating the Company’s U.S. GAAP tax provision.For the same reasons, WEX believes that adjusted net income, adjusted operating income and total segment adjusted operating income may also be useful to investors as one means of evaluating the Company's performance. However, because adjusted net income, adjusted operating income and total segment adjusted operating income are non-GAAP measures, they should not be considered as a substitute for, or superior to, net income, operating income or cash flows from operating activities as determined in accordance with GAAP. In addition, adjusted net income, adjusted operating income and total segment adjusted operating income as used by WEX may not be comparable to similarly titled measures employed by other companies.