Procurement & Spend Management Workflows4 min readUpdated September 2026

Ramp vs Procurify When Every Purchase Bills Back to a Client

For a custom software shop, the right tool depends on how much spend is billable to a client: a requisition step suits fixed-bid work with formal purchase orders, while cards with per-project limits suit time-and-materials work. A contractor invoice, testing tool license or client cloud environment should land on that client's project budget, not the general ledger.

Vendors Covered in this Article

Disclosure: We may earn a commission if you buy through some links on this page. It doesn't change what we recommend.

How do you tell which purchases are billable to a client?

Pull your last quarter of vendor spend and split it two ways: cost that belongs to the firm (payroll tools, office software, your own dev environment) and cost that belongs to a specific client engagement (a staging environment for their build, a licensed testing tool their contract requires, a contractor brought on for their sprint). Firms that bill time and materials usually find at least a third of spend is technically reimbursable and currently isn't being reimbursed, because nobody tagged the purchase to a project when it happened. Computer services firms typically wait close to 63 days to settle their own vendor bills1, which is longer than most client contracts give you to invoice back a pass-through cost, so untagged spend doesn't just sit as a rounding error, it becomes cash you fronted and may never recover. If more than a handful of your purchases need a project code before anyone can approve them, that's your first criterion, and it points toward a tool built around a requisition step rather than a bare card swipe.

Who should approve purchases in a software services firm?

In a services business, the person who should approve a purchase is usually the project lead, not a department head, because they're the one who knows whether the client's statement of work covers it. Ramp lets you issue project-specific virtual cards, so a lead can spend against a client engagement without a separate approval step, and the transaction shows up already coded to that card by the time it hits your books. Procurify routes every purchase through a requisition first, which is slower per transaction but gives you a record of who requested it and why before the money moves, useful when a client's contract requires proof of vendor vetting or when a purchase is large enough that a project lead shouldn't approve it alone. Neither model is wrong. A shop running dozens of small, fast-moving engagements usually prefers cards with tight limits per project. A shop running a handful of large, long fixed-bid contracts usually prefers requisitions, because the dollar amounts are bigger and the client is more likely to ask for documentation.

Decide how fast you need receivables to move before you commit

Custom software and product engineering firms collect from clients slower than almost any other services category: receivables run around 77.7 days at computer services firms2, well over two months between invoicing a client and seeing the cash. That gap matters here because it sets how much float you actually have on pass-through purchases. If a client reimburses you well after your vendor wants payment, you're carrying that difference on your own balance sheet every time a purchase isn't tagged and billed the moment it happens. This is the strongest argument for Procurify's model over a bare card: a requisition that captures the client code at the point of purchase gets that cost onto the next invoice automatically, instead of waiting for someone to reconstruct it from a card statement weeks later. If your engagements are short enough that this gap barely matters, a card-first approach with good expense coding is probably enough.

Weigh contractor and subcontractor payments separately

Most custom software shops route at least some work through subcontractors or specialist contractors billed by the project, and neither Ramp nor Procurify is really built as a contractor payment system on its own. Ramp handles vendor bill pay reasonably well for recurring invoices; Procurify's strength is tying a purchase order to a specific deliverable before the contractor starts, which matters if you've ever paid a subcontractor for work a client later disputed. If contractor spend is a small, steady share of your costs, either tool's bill pay function is probably fine. If it's a large and lumpy share, tied to project milestones a client can reject, the purchase order model gives you a paper trail that protects you if a client later asks why a cost was billed.

Pick based on your actual contract mix, not your headcount

Company size is the wrong axis for this decision in a services business. A small shop running a few fixed-bid enterprise contracts probably needs Procurify's requisition discipline more than a larger shop running dozens of small time-and-materials engagements, which usually does fine on cards with per-project limits and disciplined expense coding. Ask which failure mode costs you more: an engineer buying something without approval, or a client disputing a cost because nobody can show when and why it was purchased. The first points to Ramp. The second points to Procurify. For a wider look at a third option, see Procurify vs Coupa vs Ramp.

Weigh these criteria before you choose:

  • How many of your purchases need a project code before anyone can approve them; a high share points toward a requisition step.
  • Whether your clients expect formal purchase order documentation, which is common on fixed-bid enterprise contracts.
  • Whether you mostly run time-and-materials engagements, where cards with per-project limits and disciplined expense coding usually do the job.
  • How you pay contractors and subcontractors, since neither tool works as a contractor payment system on its own.
  • Whether every purchase can be tagged to a project at the moment of spend so it lands on the next client invoice.
Executive Capability Standard

What Good Looks Like

Every purchase a project incurs is tagged to the right client engagement at the moment it's made, so nothing has to be reconstructed later, and pass-through costs reach the client invoice before the vendor bill is due.

Building The Capability (5-Stage Skill Ladder)

1. Learn:Learn which of your current vendor and contractor invoices are actually billable to a client and which ones the firm should absorb itself.
2. Do Manually:Require a project code on every expense report and purchase request, and have someone cross-check spend against open contracts before each invoicing cycle.
3. Delegate:Have a project coordinator or bookkeeper tag purchases to engagements as they happen, rather than leaving it to whoever made the purchase to remember later.
4. Automate:Issue project-specific cards or requisition categories so spend is coded to a client the moment it happens, instead of during a monthly cleanup pass.
5. Buy:Adopt a procurement tool with requisition-level project coding, like Procurify, once fixed-bid contracts or client documentation requirements make a card-only approach too thin.

How to Get Started

Disclosure: We may earn a commission if you buy through some links on this page. It doesn't change what we recommend.

Frequently Asked Questions

Should client-billable purchases go through a different approval path than internal ones?

Yes, ideally. A billable purchase needs a project code attached at the moment of spend so it lands on the next client invoice automatically, while internal purchases like your own tooling can usually run through a simpler, lighter approval path since no client is watching the bill.

How do we stop engineers from buying tools without tagging them to a project?

Make the project code a required field before a card or purchase request goes through, not an optional note added later. If the system won't let someone spend without picking a client engagement, the tagging problem mostly solves itself.

Is Procurify overkill for a very small software shop?

Usually, unless you're running fixed-bid contracts with clients who expect formal purchase order documentation. A small shop doing mostly time-and-materials work can often manage with cards, per-project limits, and a habit of coding every purchase before it's approved.

What happens to unbilled pass-through costs if nobody catches them before invoicing?

They usually get written off, because reconstructing which purchase belonged to which client weeks after the fact is slow and often impossible to prove. That's the real cost of not tagging spend at the point of purchase, not the software fee either tool charges.

Sources

Where we quote a benchmark, we show its source. Other figures in this guide are estimates or general guidance, so check them against your own numbers.

  1. Payables days (AP/Sales x 365) by industry (US). NYU Stern (Aswath Damodaran), Working Capital Ratios by Industry, US, 2026.
  2. Receivables days (DSO proxy, AR/Sales x 365) by industry (US). NYU Stern (Aswath Damodaran), Working Capital Ratios by Industry, US, 2026.

Related Guides