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<SEC-DOCUMENT>0000912938-06-000027.txt : 20060127
<SEC-HEADER>0000912938-06-000027.hdr.sgml : 20060127
<ACCEPTANCE-DATETIME>20060127135011
ACCESSION NUMBER:		0000912938-06-000027
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20051130
FILED AS OF DATE:		20060127
DATE AS OF CHANGE:		20060127
EFFECTIVENESS DATE:		20060127

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFS CHARTER INCOME TRUST
		CENTRAL INDEX KEY:			0000851170
		IRS NUMBER:				043055815
		FISCAL YEAR END:			1130

	FILING VALUES:
		FORM TYPE:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-05822
		FILM NUMBER:		06556733

	BUSINESS ADDRESS:	
		STREET 1:		500 BOYLSTON ST
		STREET 2:		15TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		18006372929

	MAIL ADDRESS:	
		STREET 1:		500 BOYLSTON STREET
		STREET 2:		15TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MFS PRINCIPAL INCOME TRUST
		DATE OF NAME CHANGE:	19890906
</SEC-HEADER>
<DOCUMENT>
<TYPE>NSAR-B
<SEQUENCE>1
<FILENAME>answer.fil
<TEXT>
<PAGE>      PAGE  1
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010 B000001 801-17352
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010 C030001 02116
012 A000001 MFS SERVICE CENTER, INC.
012 B000001 84-1316
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012 C030001 02116
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013 B020001 MA
013 B030001 02116
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015 B000002 S
<PAGE>      PAGE  2
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015 C020002 MA
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022 C000002   1244302
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022 A000003 MERRILL LYNCH & CO., INC.
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022 A000004 GENERAL ELECTRIC CAPITAL CORP.
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022 A000010 LEHMAN BROTHERS HOLDINGS, INC.
<PAGE>      PAGE  3
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<PAGE>      PAGE  5
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<PAGE>      PAGE  6
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078  000000 N
080 A000000 AIG/CHUBB (co-surety)
080 B000000 C.N.A.
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SIGNATURE   JIM YOST
TITLE       ASSISTANT TREASURER

</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>b77.txt
<TEXT>
 Report of Ernst & Young LLP, Independent Registered Public Accounting Firm

To the Shareholders and Board of Trustees of
MFS Charter Income Trust

In planning and performing our audit of the financial  statements of MFS Charter
Income  Trust,  (the Fund) as of and for the year ended  November 30,  2005,  in
accordance with the standards of the Public Company  Accounting  Oversight Board
(United States),  we considered its internal  control over financial  reporting,
including  control  activities  for  safeguarding  securities,  as a  basis  for
designing our auditing  procedures  for the purpose of expressing our opinion on
the financial  statements and to comply with the requirements of Form NSAR, but
not for the purpose of expressing an opinion on the  effectiveness of the Fund's
internal  control  over  financial  reporting.  Accordingly,  we express no such
opinion.

The  management of the Fund is  responsible  for  establishing  and  maintaining
effective  internal  control  over  financial  reporting.   In  fulfilling  this
responsibility, estimates and judgments by management are required to assess the
expected  benefits and related costs of controls.  A company's  internal control
over financial  reporting is a process designed to provide reasonable  assurance
regarding  the  reliability  of  financial  reporting  and  the  preparation  of
financial statements for external purposes in accordance with generally accepted
accounting  principles.  Such internal control includes  policies and procedures
that provide reasonable  assurance  regarding  prevention or timely detection of
unauthorized  acquisition,  use or disposition of a company's  assets that could
have a material effect on the financial statements.

Because of its inherent  limitations,  internal control over financial reporting
may not prevent or detect misstatements.  Also, projections of any evaluation of
effectiveness to future periods are subject to the risk that controls may become
inadequate  because of changes in  conditions,  or that the degree of compliance
with the policies or procedures may deteriorate.

A control  deficiency  exists when the design or operation of a control does not
allow management or employees, in the normal course of performing their assigned
functions,  to prevent or detect  misstatements on a timely basis. A significant
deficiency is a control deficiency, or combination of control deficiencies, that
adversely affects the company's ability to initiate,  authorize, record, process
or report external financial data reliably in accordance with generally accepted
accounting  principles  such that there is more than a remote  likelihood that a
misstatement  of the company's  annual or interim  financial  statements that is
more than inconsequential will not be prevented or detected. A material weakness
is a significant deficiency,  or combination of significant  deficiencies,  that
results in more than a remote  likelihood  that a material  misstatement  of the
annual or interim financial statements will not be prevented or detected.

Our  consideration of the Fund's internal  control over financial  reporting was
for  the  limited  purpose  described  in the  first  paragraph  and  would  not
necessarily  disclose  all  deficiencies  in  internal  control  that  might  be
significant  deficiencies or material weaknesses under standards  established by
the Public Company Accounting Oversight Board (United States). However, we noted
no deficiencies in the Fund's internal control over financial  reporting and its
operation,  including controls for safeguarding securities,  that we consider to
be a material weakness as defined above as of November 30, 2005.

This report is intended solely for the information and use of management and the
Board of Trustees of MFS Charter  Income Trust and the  Securities  and Exchange
Commission and is not intended to be and should not be used by anyone other than
these specified parties.

Ernst & Young LLP
Boston, Massachusetts
January 10, 2006
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q1 OTHR EXHB
<SEQUENCE>3
<FILENAME>q771a.txt
<TEXT>
                            MFS CHARTER INCOME TRUST

                                SUB-ITEM 77Q1(a)

Appendix A, as revised June 28, 2005, to the Master Amended and Restated By-Laws
for MFS Charter Income Trust, dated January 1, 2002 as revised June 23, 2004, is
contained in Post-Effective  Amendment No. 57 to the Registration  Statement for
MFS  Series  Trust X (File  Nos.  33-1657  and  811-4492),  as  filed  with  the
Securities and Exchange  Commission via EDGAR on September 28, 2005,  under Rule
485 under the Securities Act of 1933.  Such document is  incorporated  herein by
reference.
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q2 ITEM 405
<SEQUENCE>4
<FILENAME>q772.txt
<TEXT>
                                   SUB-ITEM 77Q2

Elaine R. Smith filed Form 4 under Section 16(a) of the  Securities  Act of 1934
on December  14,  2005,  indicating  that she is no longer,  with regard to this
Trust,  subject to the reporting  obligations of Section 16(a) of the Securities
Act of 1934.
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
