The MBS settlement calendar — A, B, C & D day.

Notification days (the 48-hour day) and settlement days for every SIFMA class, every month. The official SIFMA published schedule for 2026–2027 — the dates your MBS operations run on.

Class A — 30yr UMBS Class B — 15yr UMBS Class C — Ginnie 30yr Class D — Ginnie 15yr

N = Notification day (48-hour day) · S = Settlement day. Class definitions are indicative groupings; AFS to confirm product mapping. Source: SIFMA MBS Notification & Settlement Dates. Update annually from sifma.org.

MBS operations specialist tracking settlement dates

Why it matters

Miss a notification day, and the whole chain slips.

TBA settlement runs on a fixed monthly cadence by class. TBA Mortgage Master tracks every notification and settlement date for you, validates good delivery, and automates pair-offs, assignments, round robins, and EPN allocations against the calendar — so nothing falls through.

See it in TBA Mortgage Master →