Atlas · Energy contracts

Daily deflation factor applied to contractual and pecuniary obligations from February 1, 1991

Reviewed on 2026-10-04 · next review 2027-04-04

Data

Data consulted on 04/10/2026.

Basis

• Law No. 8.177/1991 (Planalto, in Portuguese): Art. 27 defines the daily deflation factor (1.0116 per business day) for contractual and pecuniary obligations without indexation or with fixed correction, valid from February 1, 1991.

How it applies

The 1.0116 deflation factor is applied daily and cumulatively from February 1, 1991, by dividing the nominal value of obligations by the result of successive multiplication of the factor by each business day until the due date. The rule applies to contracts and credit instruments (including trade bills) constituted between September 1, 1990, and January 31, 1991, without indexation clauses or with fixed monetary correction.

Limits

• Exclusions: does not apply to tax obligations, school fees, condominiums, telephone, sewage, water, electricity, gas services, nor payments to non-profit clubs/associations (art. 27, § 3°).
• Changes: The Central Bank of Brazil (BC) could modify the factor or make it constant, provided 30 days' notice (art. 27, § 2°).
• Validity: this card only covers the initial period (1st/fev/1991 onwards). Later changes must be verified in Law 8.177/1991 or subsequent norms repealing or amending art. 27 (e.g., Law 9.069/1995 repealed part of art. 10).

All sheetsPlain-text version (.txt)

This pagepoint your camera
and take it with you