Technical Reference Guide for the Annual Income Estimates for Census Families, Individuals and Seniors
T1 Family File, Final Estimates, 2017

by Income Statistics Division

Release date: July 11, 2019

Correction Notice

Corrections have been made to this product.
Please take note of the following changes:

November 13, 2019

On November 13, 2019, in Section 1 within the subsection the “Data and Thresholds for Census Family Low Income Measure”, the thresholds in table G and the accompanying example were updated for 2017.


Urban planning, social policy, and local marketing strategies require a comprehensive understanding of regional socio-economic characteristics. The T1 Family File (T1FF) data, available for low levels of geography, can contribute significantly to this knowledge. These data will be a valuable aid to anyone assessing the sociological and financial status of residents in the geographic area of interest to them.

The T1FF data sources includes tables on census families, individuals and seniors. These tables are compiled from information obtained through annual personal income tax returns and is updated annually.

For simplicity, this documentation has been divided into four sections:

  • The first section deals with the source of the data, its vintage and accuracy and how the data are presented to maintain confidentiality.
  • The second section on data tables includes notes of explanation and describes the format of the data tables.
  • The glossary, in the third section, will provide the data user with definitions of the terms used in this documentation.
  • The fourth section contains an explanation of the geographic levels available.
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