EX-99.19a-1

MFS® Charter Income Trust
P.O. Box 505005 Louisville, KY 40233-5005 Notice to shareholders — Source of distribution
Distribution period	December 2019
Distribution amount per share	$0.05963

The following table sets forth the estimated amounts of the current distribution and the cumulative distributions paid this fiscal year to date from the following sources: net investment income, net realized short-term capital gains, net realized long-term capital gains and return of capital or other capital source. The fund’s fiscal year begins each December 1^st. All amounts are expressed per common share.

	Current distribution		% Breakdown of current distribution			Total cumulative distributions for the fiscal year to date		% Breakdown of the total cumulative distributions for the fiscal year to date
Net Investment Income	$	0.02991		50	%	$	0.02991		50	%
Net Realized ST Cap Gains		0.00000		0	%		0.00000		0	%
Net Realized LT Cap Gains		0.00000		0	%		0.00000		0	%
Return of Capital or Other Capital Source		0.02972		50	%		0.02972		50	%
Total (per common share)	$	0.05963		100	%	$	0.05963		100	%

Average annual total return (in relation to NAV) for the five years ended 11-30-2019	6.49	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 11-30-2019	8.00	%
Cumulative total return (in relation to NAV) for the fiscal year through 11-30-2019	15.54	%
Cumulative fiscal year distributions as a percentage of NAV as of 11-30-2019	0.67	%

You should not draw any conclusions about the fund’s investment performance from the amount of this distribution or from the terms of the fund’s managed distribution plan.

The fund estimates that it has distributed more than its income and capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur, for example, when some or all of the money that you invested in the fund is paid back to you. A return of capital distribution does not necessarily reflect the fund’s investment performance and should not be confused with “yield” or “income.”

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax-reporting purposes. The actual amounts and sources of the amounts for tax-reporting purposes will depend upon the fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

If you have any questions regarding this information, please call our fund service department at 1-800-637-2304 any business day from 9 a.m. to 5 p.m. Eastern time.

MCRSN-1219

MFS® Charter Income Trust
P.O. Box 505005 Louisville, KY 40233-5005 Notice to shareholders — Source of distribution
Distribution period	January 2020
Distribution amount per share	$0.05978

The following table sets forth the estimated amounts of the current distribution and the cumulative distributions paid this fiscal year to date from the following sources: net investment income, net realized short-term capital gains, net realized long-term capital gains and return of capital or other capital source. The fund’s fiscal year begins each December 1^st. All amounts are expressed per common share.

	Current distribution		% Breakdown of current distribution			Total cumulative distributions for the fiscal year to date		% Breakdown of the total cumulative distributions for the fiscal year to date
Net Investment Income	$	0.02924		49	%	$	0.05848		49	%
Net Realized ST Cap Gains		0.00000		0	%		0.00000		0	%
Net Realized LT Cap Gains		0.00000		0	%		0.00000		0	%
Return of Capital or Other Capital Source		0.03054		51	%		0.06093		51	%
Total (per common share)	$	0.05978		100	%	$	0.11941		100	%

Average annual total return (in relation to NAV) for the five years ended 12-31-2019	6.89	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 12-31-2019	8.00	%
Cumulative total return (in relation to NAV) for the fiscal year through 12-31-2019	1.05	%
Cumulative fiscal year distributions as a percentage of NAV as of 12-31-2019	1.33	%

You should not draw any conclusions about the fund’s investment performance from the amount of this distribution or from the terms of the fund’s managed distribution plan.

The fund estimates that it has distributed more than its income and capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur, for example, when some or all of the money that you invested in the fund is paid back to you. A return of capital distribution does not necessarily reflect the fund’s investment performance and should not be confused with “yield” or “income.”

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax-reporting purposes. The actual amounts and sources of the amounts for tax-reporting purposes will depend upon the fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

If you have any questions regarding this information, please call our fund service department at 1-800-637-2304 any business day from 9 a.m. to 5 p.m. Eastern time.

MCRSN-0120

MFS® Charter Income Trust
P.O. Box 505005 Louisville, KY 40233-5005 Notice to shareholders — Source of distribution
Distribution period	February 2020
Distribution amount per share	$0.05997

The following table sets forth the estimated amounts of the current distribution and the cumulative distributions paid this fiscal year to date from the following sources: net investment income, net realized short-term capital gains, net realized long-term capital gains and return of capital or other capital source. The fund’s fiscal year begins each December 1^st. All amounts are expressed per common share.

	Current distribution		% Breakdown of current distribution			Total cumulative distributions for the fiscal year to date		% Breakdown of the total cumulative distributions for the fiscal year to date
Net Investment Income	$	0.03095		52	%	$	0.09114		51	%
Net Realized ST Cap Gains		0.00000		0	%		0.00000		0	%
Net Realized LT Cap Gains		0.00000		0	%		0.00000		0	%
Return of Capital or Other Capital Source		0.02902		48	%		0.08824		49	%
Total (per common share)	$	0.05997		100	%	$	0.17938		100	%

Average annual total return (in relation to NAV) for the five years ended 1-31-2020	6.96	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 1-31-2020	7.99	%
Cumulative total return (in relation to NAV) for the fiscal year through 1-31-2020	2.21	%
Cumulative fiscal year distributions as a percentage of NAV as of 1-31-2020	1.99	%

You should not draw any conclusions about the fund’s investment performance from the amount of this distribution or from the terms of the fund’s managed distribution plan.

The fund estimates that it has distributed more than its income and capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur, for example, when some or all of the money that you invested in the fund is paid back to you. A return of capital distribution does not necessarily reflect the fund’s investment performance and should not be confused with “yield” or “income.”

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax-reporting purposes. The actual amounts and sources of the amounts for tax-reporting purposes will depend upon the fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

If you have any questions regarding this information, please call our fund service department at 1-800-637-2304 any business day from 9 a.m. to 5 p.m. Eastern time.

MCRSN-0220

MFS® Charter Income Trust
P.O. Box 505005 Louisville, KY 40233-5005 Notice to shareholders — Source of distribution
Distribution period	March 2020
Distribution amount per share	$0.06020

The following table sets forth the estimated amounts of the current distribution and the cumulative distributions paid this fiscal year to date from the following sources: net investment income, net realized short-term capital gains, net realized long-term capital gains and return of capital or other capital source. The fund’s fiscal year begins each December 1^st. All amounts are expressed per common share.

	Current distribution		% Breakdown of current distribution			Total cumulative distributions for the fiscal year to date		% Breakdown of the total cumulative distributions for the fiscal year to date
Net Investment Income	$	0.02668		44	%	$	0.11355		47	%
Net Realized ST Cap Gains		0.00000		0	%		0.00000		0	%
Net Realized LT Cap Gains		0.00000		0	%		0.00000		0	%
Return of Capital or Other Capital Source		0.03352		56	%		0.12603		53	%
Total (per common share)	$	0.06020		100	%	$	0.23958		100	%

Average annual total return (in relation to NAV) for the five years ended 2-29-2020	6.45	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 2-29-2020	8.11	%
Cumulative total return (in relation to NAV) for the fiscal year through 2-29-2020	1.81	%
Cumulative fiscal year distributions as a percentage of NAV as of 2-29-2020	2.69	%

You should not draw any conclusions about the fund’s investment performance from the amount of this distribution or from the terms of the fund’s managed distribution plan.

The fund estimates that it has distributed more than its income and capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur, for example, when some or all of the money that you invested in the fund is paid back to you. A return of capital distribution does not necessarily reflect the fund’s investment performance and should not be confused with “yield” or “income.”

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax-reporting purposes. The actual amounts and sources of the amounts for tax-reporting purposes will depend upon the fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

If you have any questions regarding this information, please call our fund service department at 1-800-637-2304 any business day from 9 a.m. to 5 p.m. Eastern time.

MCRSN-0320

MFS® Charter Income Trust
P.O. Box 505005 Louisville, KY 40233-5005 Notice to shareholders — Source of distribution
Distribution period	April 2020
Distribution amount per share	$0.05501

The following table sets forth the estimated amounts of the current distribution and the cumulative distributions paid this fiscal year to date from the following sources: net investment income, net realized short-term capital gains, net realized long-term capital gains and return of capital or other capital source. The fund’s fiscal year begins each December 1^st. All amounts are expressed per common share.

	Current distribution		% Breakdown of current distribution			Total cumulative distributions for the fiscal year to date		% Breakdown of the total cumulative distributions for the fiscal year to date
Net Investment Income	$	0.03003		55	%	$	0.14776		50	%
Net Realized ST Cap Gains		0.00000		0	%		0.00000		0	%
Net Realized LT Cap Gains		0.00000		0	%		0.00000		0	%
Return of Capital or Other Capital Source		0.02498		45	%		0.14683		50	%
Total (per common share)	$	0.05501		100	%	$	0.29459		100	%

Average annual total return (in relation to NAV) for the five years ended 3-31-2020	4.53	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 3-31-2020	8.19	%
Cumulative total return (in relation to NAV) for the fiscal year through 3-31-2020	-7.13	%
Cumulative fiscal year distributions as a percentage of NAV as of 3-31-2020	3.65	%

You should not draw any conclusions about the fund’s investment performance from the amount of this distribution or from the terms of the fund’s managed distribution plan.

The fund estimates that it has distributed more than its income and capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur, for example, when some or all of the money that you invested in the fund is paid back to you. A return of capital distribution does not necessarily reflect the fund’s investment performance and should not be confused with “yield” or “income.”

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax-reporting purposes. The actual amounts and sources of the amounts for tax-reporting purposes will depend upon the fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

If you have any questions regarding this information, please call our fund service department at 1-800-637-2304 any business day from 9 a.m. to 5 p.m. Eastern time.

MCRSN-0420

MFS® Charter Income Trust
P.O. Box 505005 Louisville, KY 40233-5005 Notice to shareholders — Source of distribution
Distribution period	May 2020
Distribution amount per share	$0.05474

The following table sets forth the estimated amounts of the current distribution and the cumulative distributions paid this fiscal year to date from the following sources: net investment income, net realized short-term capital gains, net realized long-term capital gains and return of capital or other capital source. The fund’s fiscal year begins each December 1^st. All amounts are expressed per common share.

	Current distribution		% Breakdown of current distribution			Total cumulative distributions for the fiscal year to date		% Breakdown of the total cumulative distributions for the fiscal year to date
Net Investment Income	$	0.03319		61	%	$	0.18317		52	%
Net Realized ST Cap Gains		0.00000		0	%		0.00000		0	%
Net Realized LT Cap Gains		0.00000		0	%		0.00000		0	%
Return of Capital or Other Capital Source		0.02155		39	%		0.16616		48	%
Total (per common share)	$	0.05474		100	%	$	0.34933		100	%

Average annual total return (in relation to NAV) for the five years ended 4-30-2020	5.12	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 4-30-2020	7.91	%
Cumulative total return (in relation to NAV) for the fiscal year through 4-30-2020	-3.69	%
Cumulative fiscal year distributions as a percentage of NAV as of 4-30-2020	4.21	%

You should not draw any conclusions about the fund’s investment performance from the amount of this distribution or from the terms of the fund’s managed distribution plan.

The fund estimates that it has distributed more than its income and capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur, for example, when some or all of the money that you invested in the fund is paid back to you. A return of capital distribution does not necessarily reflect the fund’s investment performance and should not be confused with “yield” or “income.”

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax-reporting purposes. The actual amounts and sources of the amounts for tax-reporting purposes will depend upon the fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

If you have any questions regarding this information, please call our fund service department at 1-800-637-2304 any business day from 9 a.m. to 5 p.m. Eastern time.

MCRSN-0520