Exhibit 10(f)

                                     FORM OF
                             AMENDED RULE 18F-3 PLAN
                              JANUS INVESTMENT FUND

     This Amended Rule 18f-3 Plan ("Plan") is adopted by Janus Investment Fund
("JIF") with respect to Class A Shares, Class C Shares, Class I Shares, Class J
Shares, Class L Shares, Class R Shares, Class S Shares, and Class T Shares,
(each a "Class") of each existing and future Fund (each a "Fund") of JIF
offering such Classes in accordance with the provisions of Rule 18f-3 under the
Investment Company Act of 1940, as amended (the "Act").

     1. Features of the Classes. Each Fund may issue its shares of beneficial
interest as follows: "Class A Shares," "Class C Shares," "Class I Shares,"
"Class J Shares," "Class L Shares," "Class R Shares," "Class S Shares," and
"Class T Shares." Each Class shall have exclusive voting rights on any matter
submitted to shareholders that relates solely to its service or distribution
arrangement and each Class shall have separate voting rights on any matter
submitted to shareholders in which the interests of one Class differ from the
interests of any other Class.

          (a) Class A Shares. Class A Shares are generally purchased with an
initial sales charge as set forth in the Class A Shares prospectus. However,
Class A Shares purchased without an initial sales charge and then redeemed
within 12 months of purchase may be subject to contingent deferred sales charges
as set forth in the Class A Shares prospectus. Class A Shares are subject to an
annual distribution and/or shareholder servicing fee as disclosed in the Class A
Shares prospectus.

          (b) Class C Shares. Class C Shares are sold at net asset value. Class
C Shares redeemed within 12 months of purchase will be subject to a contingent
deferred sales charge as set forth in the Class C Shares prospectus. Class C
Shares are subject to an annual distribution and/or shareholder servicing fee as
disclosed in the Class C Shares prospectus.

          (c) Class I Shares. Class I Shares are sold at net asset value and are
not subject to an initial sales charge or a contingent deferred sales charge,
but are subject to minimum purchase and eligibility requirements set forth in
the Class I Shares prospectus.

          (d) Class J Shares. Class J Shares are sold at net asset value and are
not subject to an initial sales charge or a contingent deferred sales charge,
but are subject to minimum purchase and eligibility requirements set forth in
the Class J Shares prospectus.

          (e) Class L Shares. Class L Shares are sold at net asset value and are
not subject to an initial sales charge or a contingent deferred sales charge,
but are subject to minimum purchase and eligibility requirements set forth in
the Class L Shares prospectus.

          (f) Class R Shares. Class R Shares are sold at net asset value and are
not subject to an initial sales charge or a contingent deferred sales charge,
but are subject to the minimum purchase requirements set forth in the Class R
Shares prospectus. Class R Shares are subject to an annual distribution and/or
shareholder servicing fee and/or administrative services fee as disclosed in the
Class R Shares prospectus.



          (g) Class S Shares. Class S Shares are sold at net asset value and are
not subject to an initial sales charge or a contingent deferred sales charge but
are subject to the minimum purchase requirements set forth in the Class S Shares
prospectus. Class S Shares are subject to an annual distribution fee and/or
administrative services fee as disclosed in the Class S Shares prospectus.

          (h) Class T Shares. Class T Shares are sold at net asset value and are
not subject to an initial sales charge or a contingent deferred sales charge but
are subject to the minimum purchase and eligibility requirements set forth in
the Class T Shares prospectus.

     2. Class Expenses. Class Expenses, as defined below, relating to each Class
of each Fund, are borne solely by the Class to which they relate and within each
Class are borne by each share pro rata on the basis of its net asset value.
Expenses incurred by JIF that are chargeable to a specific Class ("Class
Expenses") include expenses (not including advisory or custodial fees or other
expenses related to the management of a Fund's assets) that are incurred in a
different amount by that Class or are in consideration of services provided to
that Class of a different kind or to a different degree than are provided to
another Class. Class Expenses may include: (i) the Distribution and Servicing
Fees described in Section 3; (ii) expenses related to preparing and distributing
materials such as shareholder reports, prospectuses and proxy statements to
current shareholders of a specific Class; (iii) Blue Sky fees incurred with
respect to a specific Class; (iv) administrative, subaccounting and transfer
agency expenses in connection with the shareholders investing in a specific
Class, including the administrative services and sub-transfer agency fees
described in Section 3 and fees charged by financial intermediaries in
connection with processing transactions through the National Securities Clearing
Corporation ("NSCC") or similar processing channel; (v) litigation or other
legal expenses relating to a specific Class; (vi) fees or expenses of the
Trustees of JIF who are not interested persons of Janus Capital Management LLC
("Independent Trustees"), and of counsel and consultants to the Independent
Trustees, incurred as a result of issues relating to a specific Class; (vii)
auditing and consulting expenses relating to a specific Class; and (viii)
additional expenses incurred with respect to a specific Class as identified and
approved by the Trustees of JIF and the Independent Trustees.

     3. Administrative, Distribution and Servicing Fees.

          (a) Class A Shares. The Trust has adopted a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1 with respect to the Class A
Shares of each Fund. Under the terms of the Distribution and Shareholder
Servicing Plan, a distribution and/or shareholder servicing fee is paid out of
the assets attributable to the Class A Shares of each Fund in an amount up to
0.25% on an annual basis of the average daily net assets of that Class. Class A
Shares are subject to a networking, omnibus, or administrative services fee
which is paid out of the assets attributable to the Class A Shares of each Fund

          (b) Class C Shares. The Trust has adopted a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1 with respect to the Class C
Shares of each Fund. Under the terms of the Distribution and Shareholder
Servicing Plan, a distribution and/or shareholder servicing fee is paid out of
the assets attributable to the Class C Shares of each Fund, in an amount of up
to 1.00% on an annual basis of the average daily net assets of that Class, up to


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0.75% of which is for distribution services and up to 0.25% of which is for
shareholder account services. Class C Shares are subject to a networking,
omnibus, or administrative services fee which is paid out of the assets
attributable to the Class C Shares of each Fund

          (c) Class I Shares. Class I Shares do not have a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1, but are subject to a
networking, omnibus, or administrative services fee which is paid out of the
assets attributable to the Class I Shares of each Fund.

          (d) Class J Shares. Class J Shares do not have a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1, but are subject to a transfer
agency fee paid out of the assets attributable to the Class J Shares of each
Fund.

          (e) Class L Shares. Class L Shares do not have a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1, but are subject to transfer
agency fee paid out of the assets attributable to Class L Shares of each Fund.

          (f) Class R Shares. The Trust has adopted a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1 with respect to the Class R
Shares of each Fund offering such Shares. Under the terms of the Distribution
and Shareholder Servicing Plan, a distribution and/or shareholder servicing fee
is paid out of the assets attributable to the Class R Shares of each Fund in an
amount up to 0.50% on an annual basis of the average daily net assets of that
Class. Class R shares are subject to an administrative services fee paid out of
the assets attributable to the Class R Shares of each Fund.

          (g) Class S Shares. The Trust has adopted a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1 with respect to the Class S
Shares of each Fund offering such Shares. Under the terms of the Distribution
and Shareholder Servicing Plan, a distribution fee is paid out of the assets
attributable to the Class S Shares of each Fund in an amount up to 0.25% on an
annual basis of the average daily net assets of that Class. Class S shares are
subject to an administrative services fee that is paid out of the assets
attributable to the Class S Shares of each Fund.

          (h) Class T Shares. Class T Shares do not have a Distribution and
Shareholder Servicing Plan pursuant to Rule 12b-1, but are subject to a
sub-transfer agency fee paid out of the assets attributable to the Class T
Shares of each Fund.

     4. Differences in Class Expenses. The differences in the Class Expenses
payable by each Class pursuant to this Plan are due to: (i) the differing levels
of services provided or procured by JIF to investors eligible to purchase shares
of each Class; and (ii) the differing levels of expenses expected to be incurred
with respect to each Class, due in part to the differing systems of distribution
of each Class.

     5. Exchange Privilege. The exchange privilege offered by each Fund provides
that shares of a Class may be exchanged only for shares of the same Class of
another Fund of the Trust or as may be provided in the Prospectus for such
Funds.


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     6. Effective Date. This Plan was adopted as of October 2, 2008 and amended
March 12, 2009 pursuant to determinations made by the Trustees of JIF, including
a majority of the Independent Trustees, that the multiple class structure and
the allocation of expenses as set forth in the Plan are in the best interests of
each of the Class A Shares, Class C Shares, Class I Shares, Class J Shares,
Class L Shares, Class R Shares, Class S Shares, and Class T Shares individually
and each Fund and JIF as a whole. This Plan shall become effective upon such
date as the Trustees shall determine. This Plan will continue in effect until
terminated in accordance with Section 9.

     7. Independent Trustees. While the Plan is in effect, at least 75% of the
Trustees of JIF shall be Independent Trustees, and such Trustees shall select
and nominate any other Independent Trustees. Any person who acts as legal
counsel for the Independent Trustees shall be an "independent legal counsel" as
defined in the Act and the rules thereunder.

     8. Amendment. Material amendments to the Plan may be made with respect to a
Class at any time with the approval of the Trustees of JIF, including a majority
of the Independent Trustees, upon finding that the Plan as proposed to be
amended, including the allocation of expenses, is in the best interests of each
Class individually and each Fund and JIF as a whole.

     9. Termination. This Plan may be terminated by majority vote of the
Trustees without penalty at any time.

                                                                 October 2, 2008
                                                                  March 12, 2009


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