497

Rule 497 Document

On behalf of The Commerce Funds (the “Trust”) and its series, the Growth, Value, MidCap Growth, Bond, National Tax-Free Intermediate Bond, Missouri Tax-Free Intermediate Bond, and Kansas Tax-Free Intermediate Bond Funds, and pursuant to Rule 497(e) under the Securities Act of 1933, as amended, attached for filing is an exhibit containing interactive data format risk/return summary information. The interactive data file included as an exhibit to this filing relates to the supplement filed with the Securities and Exchange Commission on behalf of the Trust pursuant to Rule 497(e) (Accession No. 0001193125-18-260567) on August 28, 2018, which is incorporated by reference into this Rule 497 filing.

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	497
Document Period End Date	dei_DocumentPeriodEndDate	Oct. 31, 2017
Registrant Name	dei_EntityRegistrantName	COMMERCE FUNDS
Central Index Key	dei_EntityCentralIndexKey	0000926243
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Aug. 28, 2018
Document Effective Date	dei_DocumentEffectiveDate	Aug. 28, 2018
Prospectus Date	rr_ProspectusDate	Mar. 01, 2018

XML

Mar. 01, 2018

THE COMMERCE FUNDS

The Short-Term Government Fund

Supplement dated August 28, 2018 to the
Prospectus dated March 1, 2018 (the "Prospectus")

Effective September 30, 2018, the Short-Term Government Fund’s (the “Fund”) investment performance benchmark index will change from the Citigroup 1-5 Year Treasury/Government Sponsored Index (now known as the FTSE 1-5 Year Treasury/Government Sponsored Index) to the Bloomberg Barclays U.S. 1-5 Year Government Bond Index.

The following changes to the Prospectus will become effective on September 30, 2018:

The “Average Annual Total Return” table that appears under the heading Fund Performance on page 28 of the Prospectus is replaced in its entirety with the following:

Average Annual Total Returns For the periods ended December 31, 2017	1 Year		5 Years		10 Years
Returns Before Taxes		0.84%		0.54%		2.11%
Returns After Taxes on Distributions		0.14%		–0.24%		1.13%
Returns After Taxes on Distributions and Sale of Shares		0.47%		0.06%		1.24%
Bloomberg Barclays U.S. 1-5 Year Government Bond Index*		0.69%		0.74%		2.06%
FTSE 1-5 Year Treasury/Government Sponsored Index*		0.72%		0.74%		2.06%

* The Bloomberg Barclays U.S. 1-5 Year Government Bond Index replaced the FTSE 1-5 Year Treasury/Government Sponsored Index (formerly the Citigroup 1-5 Year Treasury/Government Sponsored Index) as the Fund’s performance benchmark index effective September 30, 2018 in order to better align the Fund’s benchmark with industry peers and provide Fund management with greater access to benchmark data. The Bloomberg Barclays U.S. 1-5 Year Government Bond Index is an unmanaged index comprised of U.S. Treasury and Agency securities with a minimum principal amount outstanding of $250 million and a final maturity of at least one year but no more than five years. The Index figures do not reflect any deduction for fees, taxes or expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

COMMERCE FUNDS

Prospectus Date

rr_ProspectusDate

Mar. 01, 2018

Supplement [Text Block]

cf_SupplementTextBlock

THE COMMERCE FUNDS

The Short-Term Government Fund

Supplement dated August 28, 2018 to the
Prospectus dated March 1, 2018 (the "Prospectus")

Effective September 30, 2018, the Short-Term Government Fund’s (the “Fund”) investment performance benchmark index will change from the Citigroup 1-5 Year Treasury/Government Sponsored Index (now known as the FTSE 1-5 Year Treasury/Government Sponsored Index) to the Bloomberg Barclays U.S. 1-5 Year Government Bond Index.

The following changes to the Prospectus will become effective on September 30, 2018:

The “Average Annual Total Return” table that appears under the heading Fund Performance on page 28 of the Prospectus is replaced in its entirety with the following:

Average Annual Total Returns For the periods ended December 31, 2017	1 Year		5 Years		10 Years
Returns Before Taxes		0.84%		0.54%		2.11%
Returns After Taxes on Distributions		0.14%		–0.24%		1.13%
Returns After Taxes on Distributions and Sale of Shares		0.47%		0.06%		1.24%
Bloomberg Barclays U.S. 1-5 Year Government Bond Index*		0.69%		0.74%		2.06%
FTSE 1-5 Year Treasury/Government Sponsored Index*		0.72%		0.74%		2.06%

* The Bloomberg Barclays U.S. 1-5 Year Government Bond Index replaced the FTSE 1-5 Year Treasury/Government Sponsored Index (formerly the Citigroup 1-5 Year Treasury/Government Sponsored Index) as the Fund’s performance benchmark index effective September 30, 2018 in order to better align the Fund’s benchmark with industry peers and provide Fund management with greater access to benchmark data. The Bloomberg Barclays U.S. 1-5 Year Government Bond Index is an unmanaged index comprised of U.S. Treasury and Agency securities with a minimum principal amount outstanding of $250 million and a final maturity of at least one year but no more than five years. The Index figures do not reflect any deduction for fees, taxes or expenses.

Commerce Short Term Government Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

cf_SupplementTextBlock

THE COMMERCE FUNDS

The Short-Term Government Fund

Supplement dated August 28, 2018 to the
Prospectus dated March 1, 2018 (the "Prospectus")

Effective September 30, 2018, the Short-Term Government Fund’s (the “Fund”) investment performance benchmark index will change from the Citigroup 1-5 Year Treasury/Government Sponsored Index (now known as the FTSE 1-5 Year Treasury/Government Sponsored Index) to the Bloomberg Barclays U.S. 1-5 Year Government Bond Index.

The following changes to the Prospectus will become effective on September 30, 2018:

The “Average Annual Total Return” table that appears under the heading Fund Performance on page 28 of the Prospectus is replaced in its entirety with the following:

Average Annual Total Returns For the periods ended December 31, 2017	1 Year		5 Years		10 Years
Returns Before Taxes		0.84%		0.54%		2.11%
Returns After Taxes on Distributions		0.14%		–0.24%		1.13%
Returns After Taxes on Distributions and Sale of Shares		0.47%		0.06%		1.24%
Bloomberg Barclays U.S. 1-5 Year Government Bond Index*		0.69%		0.74%		2.06%
FTSE 1-5 Year Treasury/Government Sponsored Index*		0.72%		0.74%		2.06%

* The Bloomberg Barclays U.S. 1-5 Year Government Bond Index replaced the FTSE 1-5 Year Treasury/Government Sponsored Index (formerly the Citigroup 1-5 Year Treasury/Government Sponsored Index) as the Fund’s performance benchmark index effective September 30, 2018 in order to better align the Fund’s benchmark with industry peers and provide Fund management with greater access to benchmark data. The Bloomberg Barclays U.S. 1-5 Year Government Bond Index is an unmanaged index comprised of U.S. Treasury and Agency securities with a minimum principal amount outstanding of $250 million and a final maturity of at least one year but no more than five years. The Index figures do not reflect any deduction for fees, taxes or expenses.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
For the periods ended
December 31, 2017

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

The Bloomberg Barclays U.S. 1-5 Year Government Bond Index replaced the FTSE 1-5 Year Treasury/Government Sponsored Index (formerly the Citigroup 1-5 Year Treasury/Government Sponsored Index) as the Fund's performance benchmark index effective September 30, 2018 in order to better align the Fund's benchmark with industry peers and provide Fund management with greater access to benchmark data.

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

The Index figures do not reflect any deduction for fees, taxes or expenses.

Commerce Short Term Government Fund | Short-Term Government Fund

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.84%

5 Years

rr_AverageAnnualReturnYear05

0.54%

10 Years

rr_AverageAnnualReturnYear10

2.11%

Commerce Short Term Government Fund | Returns After Taxes on Distributions | Short-Term Government Fund

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.14%

5 Years

rr_AverageAnnualReturnYear05

(0.24%)

10 Years

rr_AverageAnnualReturnYear10

1.13%

Commerce Short Term Government Fund | Returns After Taxes on Distributions and Sale of Shares | Short-Term Government Fund

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.47%

5 Years

rr_AverageAnnualReturnYear05

0.06%

10 Years

rr_AverageAnnualReturnYear10

1.24%

Commerce Short Term Government Fund | Bloomberg Barclays U.S. 1-5 Year Government Bond Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.69%

^[1]

5 Years

rr_AverageAnnualReturnYear05

0.74%

^[1]

10 Years

rr_AverageAnnualReturnYear10

2.06%

^[1]

Commerce Short Term Government Fund | FTSE 1-5 Year Treasury/Government Sponsored Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.72%

^[1]

5 Years

rr_AverageAnnualReturnYear05

0.74%

^[1]

10 Years

rr_AverageAnnualReturnYear10

2.06%

^[1]

[1] The Bloomberg Barclays U.S. 1-5 Year Government Bond Index replaced the FTSE 1-5 Year Treasury/Government Sponsored Index (formerly the Citigroup 1-5 Year Treasury/Government Sponsored Index) as the Fund's performance benchmark index effective September 30, 2018 in order to better align the Fund's benchmark with industry peers and provide Fund management with greater access to benchmark data. The Bloomberg Barclays U.S. 1-5 Year Government Bond Index is an unmanaged index comprised of U.S. Treasury and Agency securities with a minimum principal amount outstanding of $250 million and a final maturity of at least one year but no more than five years. The Index figures do not reflect any deduction for fees, taxes or expenses.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	COMMERCE FUNDS
Prospectus Date	rr_ProspectusDate	Mar. 01, 2018
Document Creation Date	dei_DocumentCreationDate	Aug. 28, 2018