The three most common post-signature cost surprises in digital strategy engagements are: change orders for work outside the initial scope, consulting hours billed separately from retainer fees, and technology or platform costs that the digital strategy agency treats as pass-through charges.
A $10,000 project can easily grow to $13,000-$15,000, and a six-week timeline may stretch to twelve weeks. All that can lead to financial overruns, reduced quality, and team burnout. Before signing, request a complete list of every line item not covered by the retainer, including: additional revision rounds beyond those specified, stakeholder workshops, tool subscriptions, third-party data licenses, and any work triggered by internal changes on your side (a rebrand, a product launch, a new market entry).
A well-run agency will provide this list without hesitation. One that deflects is signaling a billing model that depends on scope expansion to improve its own margins.