Project managers and project management offices exist to keep projects on time and within budget. To do that, they need to know what a project has actually cost, not just what was planned. In many organizations that information arrives late, because supplier invoices are paid through accounts payable and only later typed into the project system by hand.
On ServiceNow, project portfolio management lets teams build cost plans and track spend against them. Aavenir Invoiceflow, also running natively on ServiceNow, reads and approves supplier invoices. Connecting the two means approved invoices post to the right project automatically. This guide, refreshed for 2026, explains the problem, how the connection works and what project and finance teams gain.
Three challenges project managers face
1. Manual entry of actual costs
Project managers often run several projects at once, each with many resources and suppliers. During planning they map roles, resources and costs. During delivery, actual costs come in as supplier invoices, and someone has to record them against the right project and cost line. When many invoices are paid across many projects, that manual entry is slow and error prone.
Typical errors include posting the same invoice twice, recording an amount against the wrong project or supplier, or leaving an entry out altogether.
2. No real time view of spend
If actuals are posted weeks after invoices are paid, project managers do not see changes in price, quantity or scope until they show up in a monthly report. By then, the budget may already be overspent and the options for correcting course are fewer.
3. Missed expenses
Even with care, some expense lines get missed. Those gaps make the project look healthier than it is and create surprises at closeout or audit.
How the connection works
ServiceNow's project portfolio management tools let teams create cost plans for each project and track planned against actual spend. Invoiceflow uses AI to extract invoice data from multi page documents and manages approvals through digital workflows. Together they work like this.
- Invoiceflow captures invoices arriving in the accounts payable mailbox
- AI extracts the purchase order, supplier, header and line item details
- The invoice is validated with a two way or three way match against the purchase order and receipt
- For validated invoices, Invoiceflow identifies the related project cost plan from the purchase order
- The invoice record is updated with project and cost plan details
- An approval request goes to the right approver, showing the project and cost plan context
- Once approved, Invoiceflow creates an expense line in the project cost plan with invoice number, supplier, amount, due date and payment status
Read more about two way invoice matching and invoice coding and receiving.
What project and finance teams gain
| Benefit | What it means in practice |
|---|---|
| No manual posting | Invoice header and line items reach the project without retyping |
| Current actuals | Project managers see spend as invoices are approved, not weeks later |
| Better approvals | Approvers see the project and budget context when they decide |
| Cleaner audits | Every actual cost links to a validated, approved invoice |
| Fewer errors and less fraud risk | Matching rules and workflows catch duplicates and mismatches |
| Better budget decisions | Accurate actuals support reallocating and optimizing project budgets |
An example: a data center upgrade
Consider an infrastructure project with three main suppliers: a hardware vendor, an installation contractor billing monthly and a consultancy billing against milestones. Under a manual process, each invoice is paid by accounts payable and later entered against the project by a project coordinator, often in batches at month end. The project manager sees spend a month late and only in summary.
With the connection in place, the hardware invoice is captured, matched to its purchase order and receipt, and posted to the hardware line of the cost plan as soon as it is approved. The contractor's monthly invoice is matched and checked against the rates in its contract. The consultancy's milestone invoice is held until the milestone is marked complete. The project manager sees each cost the day it is approved, with the invoice attached, and can act on a variance while it is still small.
The same pattern works for any project with external costs, from software rollouts to facilities fit outs.
Bringing the contract into the picture
Many project costs come from supplier contracts: rate cards for consultants, fixed price milestones or equipment purchase terms. When those contracts are managed in Contractflow on the same platform, invoices can also be checked against contract rates and milestones before they reach the project. That catches billing above agreed rates and invoices for milestones not yet delivered. The invoice to contract compliance use case shows how.
Controls that protect the project budget
- Duplicate checks on invoice number, supplier and amount before posting
- Tolerances for price and quantity differences against the purchase order
- Holds on invoices for milestones that are not yet accepted
- Approval routing to the project manager when an invoice would exceed the cost plan line
- A full history of who approved each invoice and when it posted
These controls sit in the invoice workflow, so they apply consistently across every project instead of depending on each coordinator's diligence.
Why running both on ServiceNow matters
Because project portfolio management and Invoiceflow run on the same ServiceNow instance, they share supplier, purchase order and user data, follow the same roles and keep one audit history. There is no separate integration to maintain and no second copy of project data to reconcile. For organizations already using ServiceNow for IT and project delivery, this is the shortest path to accurate project actuals. See built on ServiceNow.
Getting started
- Make sure project purchase orders reference the project and cost plan
- Route supplier invoices for projects to the accounts payable mailbox Invoiceflow monitors
- Agree matching tolerances and approval rules with finance and project leaders
- Pilot with a few projects, compare automatic actuals with the manual process, then extend
The bottom line
Project success depends on knowing what a project actually costs. Connecting Invoiceflow with ServiceNow project portfolio management removes manual posting, gives project managers current actuals and ties every cost to an approved invoice, so budgets can be managed rather than explained after the fact.