UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

                                February 5, 2009
                               -------------------
                Date of Report (Date of earliest event reported)
                               -------------------

                                  iBASIS, INC.
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               (Exact Name of Registrant as Specified in Charter)


            DELAWARE               000-27127                  04-3332534

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  (State or Other Jurisdiction    (Commission               (IRS Employer
        of Incorporation)         File Number)            Identification No.)



                     20 Second Avenue, Burlington, MA 01803

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               (Address of Principal Executive Offices) (Zip Code)

                                 (781) 505-7500

              (Registrant's telephone number, including area code)
                                 ---------------


Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[ ]  Written communications pursuant to Rule 425 under the Securities Act
     (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
     (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))



Item 5.02. Departure of Directors or Principal Officers;  Election of Directors;
Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

(e) On February 5, 2009, the Board of Directors  established an executive  bonus
plan  ("Bonus  Plan")  with cash  awards that may be earned for fiscal year 2009
performance. The Bonus Plan covers executive officers, vice-presidents and other
key  employees  ("Plan  Participants").  The  establishment  of the  Bonus  Plan
involved setting the target amounts of such bonuses  ("Target  Amounts") and the
Corporate-wide goals upon which the bonuses will be paid. The Target Amounts for
each Plan  Participant  under the  Bonus  Plan are set at the  lesser of a fixed
dollar amount and a specified  percentage of the actual base salary paid to each
such Plan  Participant in calendar year 2009.  There have been no adjustments to
the base salaries of our named  executive  officers  since  February,  2008. The
maximum Target Amounts for Mr. Ofer Gneezy, Dr. Gordon  VanderBrug,  Mr. Richard
Tennant,  Mr. Paul Floyd and Mr. Mark Flynn are  $588,000,  $396,000,  $242,000,
$226,000 and $173,000, respectively.

     Subject  to  the  achievement  of  an  established   minimum  Gross  Margin
Percentage  for the full  year 2009  (the  "Gross  Margin  Hurdle  Amount")  the
determination of the actual amount of the annual incentive bonus under the Bonus
Plan to be paid to each Plan  Participant (the "Bonus Payout") shall be based on
two  components  which shall be given equal  weight as follows:  i) the Adjusted
EBITDA percentage  ("EBITDA  Percentage")  shall be determined by the percentage
achievement of the Adjusted  EBITDA amount  reflected our 2009 Annual  Financial
Plan as  approved  by our Board of  Directors  (the "2009  Plan")  such that the
EBITDA Percentage  increases  linearly from zero at zero Adjusted EBITDA to 100%
at 100% of  Adjusted  EBITDA  reflected  in the  2009  Plan  and  further,  from
achievement  of Adjusted  EBITDA of 100% of the 2009 Plan to Adjusted  EBITDA of
150% of the 2009 Plan,  the EBITDA  Percentage  increases  linearly from 100% to
200%, ii) the Free Cash Flow percentage ("FCF  Percentage")  shall be determined
by the percentage achievement of the Free Cash Flow amount reflected in the 2009
Plan such that the FCF Percentage increases linearly from zero at zero Free Cash
Flow to 100% at 100% of Free Cash Flow  reflected  in the 2009 Plan and further,
from achievement of Free Cash Flow of 100% of the 2009 Plan to Free Cash Flow of
150% of the 2009 Plan, the FCF Percentage  increases linearly from 100% to 200%,
and  iii) the  respective  Target  Amount  for each  Plan  Participant  shall be
multiplied by the simple average of the EBITDA Percentage and the FCF Percentage
to determine the Bonus Payout for such Plan Participant,  with the Bonus Payouts
being capped at 200% of the Target Amounts; provided, however, that if the Gross



Margin Hurdle  Amount is not achieved  there shall be no Bonus Payouts under the
Bonus Plan to any Plan Participant.  Mr. Ofer Gneezy, Dr. Gordon VanderBrug, Mr.
Richard Tennant,  Mr. Paul Floyd, and Mr. Mark Flynn will be eligible to receive
a  year-end  discretionary  bonus  of  up  to  $1,176,000,  $792,000,  $484,000,
$452,000,  and  $346,000,  respectively,  assuming  maximum  Bonus  Payouts  are
achieved.  The actual Bonus Payouts under such awards may, at the  discretion of
the Compensation Committee of our Board of Directors, be less than or, except in
the case of executive  officers,  greater than the Bonus  Payouts  calculated in
accordance with the Bonus Plan formula described above.

These Bonus Payouts will be accrued quarterly based on year-to-date achievement
of the financial plan. Actual Bonus Payouts will be paid following the end of
the year.






                                    SIGNATURE
                                    ---------

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Company  has  duly  caused  this  report  to be  signed  on  its  behalf  by the
undersigned hereunto duly authorized.

Date:  February 6, 2009         iBASIS, INC.

                                By: /s/ Mark S. Flynn
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                                    Mark S. Flynn
                                    Chief Legal Officer and Corporate Secretary