EX-99.19a-1

MFS^® Intermediate High Income Fund

P.O. Box 43078

Providence, RI 02940-3078

Notice to shareholders — Source of distribution

Distribution period	June 2019
Distribution amount per share	$0.02012

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	$	0.01130		56	%	$	0.08116		58	%
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		0.00882		44	%		0.05766		42	%
Total (per common share)	$	0.02012		100	%	$	0.13882		100	%

Average annual total return (in relation to NAV) for the five years ended 5-31-2019	4.81	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 5-31-2019	9.62	%
Cumulative total return (in relation to NAV) for the fiscal year through 5-31-2019	7.12	%
Cumulative fiscal year distributions as a percentage of NAV as of 5-31-2019	5.53	%

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.

CIHSN-0619

MFS^® Intermediate High Income Fund

P.O. Box 43078

Providence, RI 02940-3078

Notice to shareholders — Source of distribution

Distribution period	July 2019
Distribution amount per share	$0.02020

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	$	0.01144		57	%	$	0.09275		58	%
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		0.00876		43	%		0.06627		42	%
Total (per common share)	$	0.02020		100	%	$	0.15902		100	%

Average annual total return (in relation to NAV) for the five years ended 6-30-2019	5.28	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 6-30-2019	9.43	%
Cumulative total return (in relation to NAV) for the fiscal year through 6-30-2019	10.54	%
Cumulative fiscal year distributions as a percentage of NAV as of 6-30-2019	6.19	%

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.

CIHSN-0719

MFS^® Intermediate High Income Fund

P.O. Box 43078

Providence, RI 02940-3078

Notice to shareholders — Source of distribution

Distribution period	August 2019
Distribution amount per share	$0.02035

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	$	0.01109		54	%	$	0.10352		58	%
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		0.00926		46	%		0.07585		42	%
Total (per common share)	$	0.02035		100	%	$	0.17937		100	%

Average annual total return (in relation to NAV) for the five years ended 7-31-2019	5.84	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 7-31-2019	9.50	%
Cumulative total return (in relation to NAV) for the fiscal year through 7-31-2019	11.41	%
Cumulative fiscal year distributions as a percentage of NAV as of 7-31-2019	6.98	%

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.

CIHSN-0819

MFS^® Intermediate High Income Fund

P.O. Box 43078

Providence, RI 02940-3078

Notice to shareholders — Source of distribution

Distribution period	September 2019
Distribution amount per share	$0.02024

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	$	0.01056		52	%	$	0.11359		57	%
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		0.00968		48	%		0.08602		43	%
Total (per common share)	$	0.02024		100	%	$	0.19961		100	%

Average annual total return (in relation to NAV) for the five years ended 8-31-2019	5.63	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 8-31-2019	9.41	%
Cumulative total return (in relation to NAV) for the fiscal year through 8-31-2019	12.73	%
Cumulative fiscal year distributions as a percentage of NAV as of 8-31-2019	7.74	%

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.

CIHSN-0919

MFS^® Intermediate High Income Fund

P.O. Box 505005

Louisville, KY 40233-5005

Notice to shareholders — Source of distribution

Distribution period	October 2019
Distribution amount per share	$0.02038

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	$	0.01136		56	%	$	0.12578		57	%
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		0.00902		44	%		0.09421		43	%
Total (per common share)	$	0.02038		100	%	$	0.21999		100	%

Average annual total return (in relation to NAV) for the five years ended 9-30-2019	6.26	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 9-30-2019	9.52	%
Cumulative total return (in relation to NAV) for the fiscal year through 9-30-2019	13.18	%
Cumulative fiscal year distributions as a percentage of NAV as of 9-30-2019	8.56	%

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.

CIHSN-1019

MFS^® Intermediate High Income Fund

P.O. Box 505005

Louisville, KY 40233-5005

Notice to shareholders — Source of distribution

Distribution period	November 2019
Distribution amount per share	$0.02028

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	$	0.01151		57	%	$	0.13747		57	%
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		0.00877		43	%		0.10280		43	%
Total (per common share)	$	0.02028		100	%	$	0.24027		100	%

Average annual total return (in relation to NAV) for the five years ended 10-31-2019	6.03	%
Annualized current distribution rate expressed as a percentage of month end NAV as of 10-31-2019	9.47	%
Cumulative total return (in relation to NAV) for the fiscal year through 10-31-2019	14.07	%
Cumulative fiscal year distributions as a percentage of NAV as of 10-31-2019	9.35	%

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.

CIHSN-1119