Retainers vs. Project Fees: Picking ERP for an Agency

Retainer revenue is usually recognized evenly over the service period, straightforward and predictable. Project fees, a rebrand, a website build, a campaign launch, often follow percentage-of-completion or milestone-based recognition instead, tied to deliverables rather than the calendar. An agency running both models needs its system to apply the right pattern automatically by contract type, not force the bookkeeper to remember which client gets which treatment every month. Sage Intacct's project and revenue management modules handle that split cleanly and tend to be the faster implementation for a single-entity agency.

NetSuite can do the same work but with a heavier setup, which is why it tends to fit an agency that has already outgrown Sage Intacct's ceiling rather than one just standing up project accounting for the first time.

Say a client wires an agency $50,000 for a media campaign and the agency spends $45,000 of it on ad placements: only the management fee is the agency's actual revenue, the rest is a pass-through liability, not income, even though it moves through the same bank account. Booking the full amount as revenue and the ad spend as an expense inflates both top-line revenue and apparent cost in a way that distorts every margin calculation downstream, including the ones you'd show a lender or a buyer during due diligence.

Both platforms can model pass-through media correctly with the right account structure, but it has to be designed in deliberately since neither system defaults to separating agency fee from client media spend automatically.

An agency account that looks profitable in total often isn't once you separate the retainer margin from the near-zero margin on pass-through media and the below-target margin on a rush project the team took on to keep the relationship. Dimensional reporting, tagging revenue and cost by client, service type, and account team, is what makes that visible without an analyst rebuilding the view from a spreadsheet every month. Gross margin comparisons are also worth grounding in your own numbers rather than a single blended industry figure, since agency margin mix varies enormously by how much of the work is media-heavy versus creative or strategy-heavy¹.

Account team cost is the piece agencies most often leave out of this picture. If three people spend a meaningful share of their week on an account that only bills a modest retainer, the account can look profitable at the invoice level while actually losing money once labor is allocated correctly, and that gap only shows up when cost is tagged at the same account level as revenue.

For a single-entity agency with a mix of retainer and project clients, Sage Intacct's project accounting and dimensional reporting usually get you to clean, trustworthy margin reporting faster than a heavier platform would. Receivables days matter just as much as the ERP choice here: agencies that let client payment terms drift long are effectively financing client media spend out of their own cash, a risk worth watching closely regardless of which system you pick².

The clearest trigger for NetSuite is operating through multiple legal entities, commonly a holding structure after acquiring another agency, or running significant inventory-adjacent work like branded merchandise or event production alongside standard service billing. Below that threshold, NetSuite's extra operational scope is mostly capability you're paying for without using.

The first month-end close on a new system is where pass-through media mistakes usually surface, either the whole media budget lands in revenue by accident, or a client's management fee gets buried inside a larger transaction and understates true billing. Run a full parallel close on both your old and new system for at least one month before cutting over completely, comparing management-fee revenue, pass-through totals, and account-level margin line by line. That comparison catches setup mistakes while you still have the old system as a reference point, which is far cheaper than discovering the error three months into reporting on the new one alone.

Check these items during the first parallel close:

• Confirm the client's full media budget did not land in revenue by accident, since pass-through spend belongs in a liability.
• Look for management fees buried inside a larger transaction, which understates true billing for that client.
• Compare margin by client between the old and new system to see whether the two agree.
• Run the parallel close for at least one full month before cutting over completely.