Label

Element

Value

Prospectus:

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Document Type

dei_DocumentType

497

Document Period End Date

dei_DocumentPeriodEndDate

Aug. 31, 2019

Entity Registrant Name

dei_EntityRegistrantName

PRINCIPAL FUNDS INC

Central Index Key

dei_EntityCentralIndexKey

0000898745

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

May 29, 2020

Document Effective Date

dei_DocumentEffectiveDate

May 29, 2020

Prospectus Date

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Dec. 31, 2019

Principal Funds Inc | Origin Emerging Markets Fund

Prospectus:

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Supplement [Text Block]

ck0000898745_SupplementTextBlock

Principal Funds, Inc.

Supplement dated May 29, 2020

to the Statutory Prospectus dated December 31, 2019

(as previously supplemented)

This supplement updates information currently in the Statutory Prospectus. Please retain this supplement for future reference.

Risk/Return [Heading]

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SUMMARY FOR ORIGIN EMERGING MARKETS FUND

Risk [Heading]

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Under Principal Risks, add the following below Emerging Markets Risk:

Risk Narrative [Text Block]

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China Investment Risk. The Fund invests a significant portion of its assets in securities of issuers located or operating in China. Investing in China involves certain heightened risks and considerations relative to investments in more developed countries, including, among others: frequent trading suspensions and government interventions (including by nationalizing assets); currency exchange rate fluctuations or blockages; limits on using brokers and on foreign ownership; different financial reporting standards; higher dependence on exports and international trade; political and social instability; infectious disease outbreaks; regional and global conflicts; increased trade tariffs, embargoes and other trade limitations; custody and other risks associated with programs used to access Chinese securities; and uncertainties in tax rules that could result in unexpected tax liabilities for the Fund. Significant portions of the Chinese securities markets may become rapidly illiquid, as Chinese issuers have the ability to suspend the trading of their equity securities.