April 10, 2019

Robert W. Hau
Chief Financial Officer
Fiserv, Inc.
225 Fiserv Dr.
Brookfield, WI 53045

       Re: Fiserv, Inc.
           Form 10-K for Fiscal Year Ended December 31, 2018
           Filed February 21, 2019
           Form 8-K furnished February 7, 2019
           File No. 000-14948

Dear Mr. Hau:

       We have limited our review of your filing to the financial statements
and related
disclosures and have the following comments. In some of our comments, we may
ask you to
provide us with information so we may better understand your disclosure.

       Please respond to these comments within ten business days by providing
the requested
information or advise us as soon as possible when you will respond. If you do
not believe our
comments apply to your facts and circumstances, please tell us why in your
response.

       After reviewing your response to these comments, we may have additional
comments.

Form 10-K for the Fiscal Year Ended December 31, 2018

Management's Discussion and Analysis of Financial Condition and Results of
Operations
Results of Operations, page 27

1.    You state that processing and services revenue is primarily generated
from account and
      transaction-based fees. We also note your statement in the fourth quarter
2018 earnings
      release transcripts that "increased adoption and growing transaction
volumes remain
      important elements of driving high-quality revenue growth." Tell us
whether the volume
      of transactions processed is used in managing your business, or tell us
what other metrics
      management uses, and include a quantified discussion of such metrics for
each period
      presented in future filings. Refer to Item 303(a)(3) of Regulation S-K
and Section III.B.1
      of SEC Release No. 33-8350.
 Robert W. Hau
FirstName LastNameRobert W. Hau
Fiserv, Inc.
Comapany NameFiserv, Inc.
April 10, 2019
Page 10,
April 2 2019 Page 2
FirstName LastName
Form 8-K furnished February 7, 2019

Reconciliation of GAAP to Adjusted Net Income and Adjusted Earnings Per Share ,
page 8

2.       We note that your adjusted net income, adjusted operating income and
related margins,
         and adjusted EPS measures include an adjustment for "amortization of
acquisition-related
         intangibles." Please tell us how you determined that adjusting for
amortization related
         only to acquisition-related intangibles, rather than all amortization
expense, complies with
         Question 100.04 of the Non-GAAP C&DIs. Also, tell us why you believe
this
         information is useful to investors.
       In closing, we remind you that the company and its management are
responsible for the
accuracy and adequacy of their disclosures, notwithstanding any review,
comments, action or
absence of action by the staff.

       You may contact Rebekah Lindsey, Staff Accountant at (202) 551-3303 or
Kathleen
Collins, Accounting Branch Chief at (202) 551-3499 with any questions.



                                                               Sincerely,

                                                               Division of
Corporation Finance
                                                               Office of
Information Technologies
                                                               and Services