Subject to certain restrictions, the Canadian unemployment insurance ( UI ) system permits insurance benefit recipients to work and supplement the UI benefits. Although this provision relating to the treatment of earnings during the benefit period under the UI (now called EI) Act had been in operation for many years, hardly anything is known about the extent to which this provision is utilised and what impact this has had on their UI benefit period. The main objective of the provision during the benefit period is to encourage UI claimants to maintain some linkage with the job market so that their re-employment is facilitated. The empirical analysis presented here confirms that the UI benefit period of insurance claimants working while on claim is substantially shorter than that of others who do not work while on claim.