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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 12b-25


                                               Commission File Number __________

                           NOTIFICATION OF LATE FILING

(Check One)
[ ] Form 10-K and Form 10-KSB  [ ] Form 11-K
[ ] Form 20-F                  [X] Form 10-Q and Form 10-QSB     [ ]  Form N-SAR

For Period Ended:               March 31, 2000

[ ]  Transition Report on Form 10-K and Form 10-KSB

[ ]  Transition Report on Form 20-F

[ ]  Transition Report on Form 11-K

[ ]  Transition Report on Form 10-Q and Form 10-QSB

[ ]  Transition Report on Form N-SAR


For the Transition Period Ended:   ____________________

Read attached instruction sheet before preparing form. Please print or type.

   Nothing in this form shall be construed to imply that the Commission has
   verified any information contained herein.

   If the notification relates to a portion of the filing checked above,
   identify the item(s) to which the notification relates: ___________________


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                                     PART I
                             REGISTRANT INFORMATION

Full name of registrant:   MICROFINANCIAL INCORPORATED


Former name if applicable: N/A

Address of principal executive office (Street and number):    950 Winter Street

City, state and zip code:  Waltham, Massachusetts 02451

                                     PART II
                             RULE 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed. (Check appropriate box.)

[X]      (a)      The reasons described in reasonable detail in Part III of
                  this form could not be eliminated without unreasonable
                  effort or expense;

[X]      (b)      The subject annual report, semi-annual report, transition
                  report on Form 10-K, 10-KSB, 20-F, 11-K or Form N-SAR, or
                  portion thereof will be filed on or before the 15th calendar
                  day following the prescribed due date; or the subject
                  quarterly report or transition report on Form 10-Q, 10-QSB,
                  or portion thereof will be filed on or before the fifth
                  calendar day following the prescribed due date; and

         (c)      The accountant's statement or other exhibit required by Rule
                  12b-25(c) has been attached if applicable.

                                    PART III
                                    NARRATIVE

     State below in reasonable detail the reasons why Form 10-K, 10-KSB, 11-K,
20-F, 10-Q, 10-QSB, N-SAR or the transition report portion thereof could not be
filed within the prescribed time period. (Attach extra sheets if needed.)

As a result of unforeseen delays in connection with the preparation of the
Registrant's quarterly financial statements, the Registrant is unable to file
its Quarterly Report on Form 10-Q within the prescribed time period. The
Registrant cannot eliminate the reasons for its inability to file the foregoing
Report without unreasonable effort and/or expense. The foregoing Report will be
filed no later than the fifth calendar day following the prescribed due date for
the Report.


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                                     PART IV
                                OTHER INFORMATION

(1)  Name and telephone number of person to contact in regard to this
     notification


        Richard F. Latour                           (781)890-0177
        -----------------                          --------------

             (Name)                          (Area Code) (Telephone Number)

     (2) Have all other periodic reports required under Section 13 or 15(d) of
     the Securities Exchange Act of 1934 or Section 30 of the Investment Company
     Act of 1940 during the preceding 12 months or for such shorter period that
     the registrant was required to file such report(s) been filed? If answer is
     no, identify report(s).
                                                                [X] Yes [ ] No

     (3) Is it anticipated that any significant change in results of operations
     from the corresponding period for the last fiscal year will be reflected by
     the earnings statements to be included in the subject report or portion
     thereof?

                                                                [ ] Yes [X] No

     If so: attach an explanation of the anticipated change, both narratively
     and quantitatively, and, if appropriate, state the reasons why a reasonable
     estimate of the results cannot be made.


                           MicroFinancial Incorporated
                           ---------------------------
                  (Name of Registrant as Specified in Charter)

Has caused this notification to be signed on its behalf by the undersigned
hereunto duly authorized.


Date  May 15, 2000                   By /s/ PETER R. BLEYLEBEN
      ------------                   ----------------------------

                                         Peter R. Bleyleben, President
                                         Name and Title

Instruction: The form may be signed by an executive officer of the registrant or
by any other duly authorized representative. The name and title of the person
signing the form shall be typed or printed beneath the signature. If the
statement is signed on behalf of the registrant by an authorized representative
(other than an executive officer), evidence of the representative's authority to
sign on behalf of the registrant shall be filed with the form.

                                    ATTENTION

Intentional misstatements or omissions of fact constitute Federal criminal
violations (see 18 U.S.C. 1001).