20 CFR § 225.40 - General.

---
identifier: "/us/cfr/t20/s225.40"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "20 CFR § 225.40 - General."
title_number: 20
title_name: "Employees' Benefits"
section_number: "225.40"
section_name: "General."
chapter_name: "RAILROAD RETIREMENT BOARD"
subchapter_number: "B"
subchapter_name: "REGULATIONS UNDER THE RAILROAD RETIREMENT ACT"
part_number: "225"
part_name: "PRIMARY INSURANCE AMOUNT DETERMINATIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "45 U.S.C. 231f(b)(5)."
regulatory_source: "54 FR 12903, Mar. 29, 1989, unless otherwise noted."
cfr_part: "225"
---


# 225.40 General.

A cost-of-living increase is an automatic increase in a PIA provided under section 215(i) of the Social Security Act. The Social Security Administration determines the percentage amount of any cost-of-living increase paid by the Board.