ERP for Custom Software Shops: NetSuite vs Sage Intacct

Fixed-price and time-and-materials engagements are often recognized differently under ASC 606: fixed-price work is commonly recognized over time using a measure of progress against a defined scope, while time-and-materials work is often recognized as hours are delivered and billed, so confirm the right method with your accountant. If you run both models at once, and most custom software firms do, your system needs project accounting that can handle each contract type on its own terms rather than forcing every engagement into a single template. Sage Intacct's project accounting module was built with exactly this kind of professional-services billing in mind, and its automated revenue recognition handles multi-element contracts (a build phase plus an ongoing support retainer, for example) without a manual override.

NetSuite covers the same ground once configured, but the configuration lift is heavier, which is why it tends to be the better fit for a firm that has already outgrown a lighter system rather than one standing up project accounting for the first time.

The difference that actually matters day to day is whether project profitability, revenue and true cost by project, by developer, by client, lives natively in the system or gets bolted on through a separate time-tracking tool that syncs imperfectly with the ledger. A firm running a dozen active engagements at once needs to see margin by project without waiting for a finance team to reconcile two systems every month. Both platforms offer this, but Sage Intacct's dimensional structure makes slicing that data by project, client, and cost center more direct out of the box.

If you're also selling a licensed product alongside custom builds, that adds a second revenue stream with its own recognition pattern, and the system needs to keep the two from bleeding into each other in your reporting.

If you're capitalizing internally developed software under ASC 350-40, you need a clean audit trail showing which development hours were capitalizable and which were maintenance or bug-fix work that has to be expensed, and you should ask your CPA how ASU 2025-06, which changes the capitalization model for annual periods beginning after December 15, 2027, will affect you. That distinction depends on your specific facts and the accounting treatment your CPA signs off on, so get that policy confirmed with your accountant before you configure either system, not after. Once the policy is set, both NetSuite and Sage Intacct can track capitalized labor against a project code, but only if your time-tracking discipline actually separates the two categories of work at the point of entry.

Gross margin also reads very differently across custom software shops depending on how much of the work is offshored or subcontracted, which is one more reason to benchmark your own numbers rather than assume a single industry figure applies¹.

Once you're running multiple entities, say a US development company and an offshore subsidiary handling delivery, NetSuite's multi-subsidiary consolidation and native operational modules (inventory for any hardware components, more complex procurement) start to earn their higher implementation cost. It's also the stronger choice if you're tracking a burn multiple against investor expectations and need that number produced automatically rather than assembled by hand each month².

For a single-entity firm focused purely on services revenue, that extra operational depth is mostly unused capacity you're paying to maintain.

A smaller shop with a handful of active projects and simpler contract terms can often run well on QuickBooks with a solid project-costing add-on, especially in the early years before contract complexity picks up. The honest signal that you've outgrown it is when your finance team is spending real time each month reconstructing project margin by hand instead of pulling it from a report. That's usually the point where Sage Intacct's native project accounting starts to pay for itself, well before NetSuite's broader scope becomes necessary.

Custom software firms lean heavily on subcontractors and offshore development partners, and that changes how cost of goods sold should be structured. If a subcontractor invoice arrives weeks after the work was delivered to the client, your project margin looks artificially high until that cost finally lands, then drops without warning. Both platforms can accrue for known but unbilled subcontractor costs, but only if someone sets up that accrual process deliberately rather than waiting for the invoice to show up.

This matters even more once you're bidding fixed-price work: underestimating subcontractor cost timing is a quiet way to win a deal on paper and lose money delivering it, and neither ERP catches that for you without an accrual policy someone actually maintains.

Have each vendor walk through your messiest real contract: a fixed-price build with a change order mid-project, partial subcontractor delivery, and a support retainer starting the month after go-live. Watch exactly how revenue, cost, and margin flow through their system for that one contract, not a clean demo scenario. If either vendor can't do that live, in front of you, with your numbers, that's worth weighing as heavily as anything else in the comparison.

Ask each vendor to demonstrate these scenarios with your real contracts:

• A fixed-price build with a mid-project change order, showing how revenue, cost, and margin flow through the books.
• Partial subcontractor delivery, where the invoice arrives weeks after the work reaches the client.
• A support retainer that starts the month after go-live, recognized on its own pattern.
• Project profitability by developer and client, and whether it lives natively in the system or depends on a bolted-on time-tracking tool.