BigCommerce Margin Threshold

The BigCommerce Margin Threshold framework helps agencies decide whether a client project is worth taking on by comparing the platform's per-storefront add-on costs ($30-$100/month depending on plan tier) against the agency's retainer margin. For example, an agency charging a $2,500 monthly retainer for a BigCommerce store with a $50/month add-on sees a 2% cost, which is acceptable. But if the retainer is only $1,000 and the add-on is $100, the cost jumps to 10%, eroding profitability. The framework also factors in the entry plan at $29/month (annual billing) and the auto-upgrade triggers at $30K and $100K TTM GMV, which can raise costs as clients grow. Agencies should set a threshold: if the per-storefront cost exceeds 5% of the retainer, either raise the retainer or pass the cost to the client. This prevents margin erosion and ensures sustainable delivery.