N-4

Jul. 11, 2025

Prospectus:

Document Type

N-4

Entity Registrant Name

Principal Life Insurance Company Separate Account B

Entity Central Index Key

0000009713

Entity Investment Company Type

N-4

Document Period End Date

Jul. 11, 2025

Amendment Flag

false

Item 17. Investment Options [Line Items]

Investment Options (N-4) [Text Block]

APPENDIX A: INVESTMENT OPTIONS AVAILABLE UNDER THE CONTRACT

The following changes are made to the list of Underlying Mutual Funds available under the Contract contained in the above-referenced appendix.

Effective July 28, 2025, the existing row for Neuberger Berman AMT Sustainable Equity – S Class Shares is replaced with the new row below to reflect a fund name change:

Type	Portfolio Advisor/Sub-advisor	Current Expenses (Net)	Average Annual Total Returns (as of 12/31/24)
			1 year	5 year	10 year
Large Blend	Neuberger Berman AMT Quality Equity Portfolio (1) – S Class Shares Neuberger Berman Investment Advisers, LLC	1.15%	25.52%	13.68%	11.18%

Variable Option [Line Items]

Portfolio Companies [Table Text Block]

Type	Portfolio Advisor/Sub-advisor	Current Expenses (Net)	Average Annual Total Returns (as of 12/31/24)
			1 year	5 year	10 year
Large Blend	Neuberger Berman AMT Quality Equity Portfolio (1) – S Class Shares Neuberger Berman Investment Advisers, LLC	1.15%	25.52%	13.68%	11.18%

Neuberger Berman AMT Quality Equity Portfolio – S Class Shares [Member]

Variable Option [Line Items]

Portfolio Company Objective [Text Block]

Large Blend

Portfolio Company Name [Text Block]

Neuberger Berman AMT Quality Equity Portfolio ⁽¹⁾ – S Class Shares

Portfolio Company Adviser [Text Block]

Neuberger Berman Investment Advisers, LLC

Current Expenses [Percent]

1.15%

Average Annual Total Returns, 1 Year [Percent]

25.52%

Average Annual Total Returns, 5 Years [Percent]

13.68%

Average Annual Total Returns, 10 Years [Percent]

11.18%