Vs other benefits
The CRA and Service Canada run several payments that land in the same bank account, and their names blur together. This page keeps the GST/HST credit apart from its neighbours, because confusing them is how people miss a payment they were owed or chase a payment that was never theirs.
Canada Child Benefit (CCB)
The CCB is a monthly, tax-free payment for families with children under 18, and it is usually much larger than the GST/HST credit. The two share machinery — both are calculated from your tax return, both use family income, and a child registered for the CCB is normally counted for the credit too — but they are separate entitlements with separate notices. The GST/HST credit also counts children up to age 19, one year beyond the CCB's limit, so a family with an 18-year-old may still receive a child amount in the credit after the CCB for that child has ended. If your CCB stops, do not assume the credit stops with it, and if the credit stops, do not assume the CCB has stopped. Check each notice separately.
Canada Workers Benefit (CWB)
The CWB is a refundable tax credit for low-income workers, claimed through the tax return and paid partly in advance during the year. Unlike the GST/HST credit, it requires working income: it phases in as earnings rise from a low floor, and it is designed to reward work. A household can receive both in the same year — the CWB for working, the GST/HST credit for sales tax — and neither reduces the other directly. The confusion usually runs the other way: people who receive CWB advance payments sometimes mistake a quarterly GST/HST credit deposit for a CWB instalment, or the reverse. The program name on the notice, and from July 2026 the Canada Groceries and Essentials Benefit label, tells them apart.
Guaranteed Income Supplement (GIS) and Old Age Security (OAS)
GIS is a monthly supplement for low-income seniors who already receive OAS. It is income-tested on the senior's own circumstances and is paid by Service Canada, not through the quarterly CRA cycle. A senior can receive OAS, GIS, and the GST/HST credit at the same time: the credit is not reduced by OAS or GIS, and GIS is not reduced by the credit, because the credit is tax-free and is not counted as income for GIS purposes. Seniors are a group the credit is easily missed by, because a senior with only OAS and GIS income may assume there is nothing to file — and, as this site repeats, no return means no credit.
Employment Insurance (EI)
EI is a temporary income replacement for people who lose a job or cannot work for reasons such as illness or parental leave, paid weekly and based on insurable earnings and hours. It has nothing to do with sales tax, and receiving EI does not disqualify you from the credit. What EI does affect is your income for the year: EI benefits count toward line 23600, so a year on EI can push your adjusted family net income up the phase-out slope for the following benefit year, even though your earnings fell. That is a timing effect worth anticipating, not a penalty: the credit follows last year's income, so a bad year for work can still produce a smaller credit the following July.
What does not interact
Receiving the GST/HST credit does not reduce any other federal benefit, and no other federal benefit reduces it, because the credit is tax-free and is excluded from the income measures other programs use. The only interactions that matter are the ones on the provincial credits page, where a provincial amount may share the same deposit, and the shared-custody split, where two parents divide one child's amount. If a letter claims your credit was reduced because of another benefit, read it carefully: the reduction almost certainly comes from income, a recalculation trigger, or a provincial layer, not from the other benefit itself.