Procurement Professionals: What Causes the Biggest Delays in Supplier Onboarding?

I work closely with procurement teams and often hear that supplier onboarding and vendor management still involve a surprising amount of manual work—email chains, spreadsheets, document follow-ups, and status tracking.

I'm curious whether that's still the reality for most organizations, or if many teams have largely streamlined these processes.

A few questions:

What stage of supplier onboarding or ongoing vendor maintenance creates the most bottlenecks? Which supplier documents tend to cause the most issues—insurance certificates, tax forms, banking details, compliance documentation, certifications, or something else? When onboarding gets delayed, what is usually the root cause: poor visibility into progress, missed deadlines, incomplete documentation, compliance reviews, or other factors? When evaluating multiple suppliers for the same product or service, how do you compare pricing, lead times, payment terms, and other key factors? What part of that process do you find the most time-consuming or frustrating?

I'd be interested in hearing how your organization handles these challenges and whether you've found effective ways to reduce the administrative burden.

Based on what procurement professionals commonly report, the biggest bottlenecks are usually not finding suppliers but collecting, validating, and maintaining supplier information.

The most common friction points are:

Chasing documentation

W-9/W-8 forms Certificates of insurance Banking details Compliance certifications Security questionnaires ESG and diversity documentation

Suppliers often submit incomplete, outdated, or inconsistent information, leading to multiple rounds of follow-up.

Internal approvals

Legal review Compliance review Information security review Finance approval Business owner sign-off

Even when suppliers respond quickly, onboarding can sit in internal queues for days or weeks.

Vendor risk and compliance checks

Sanctions screening Financial stability reviews Background checks Data privacy assessments Third-party risk assessments

These reviews are often handled by different teams using different systems.

Poor visibility Many organizations still rely on email and spreadsheets, making it difficult to answer simple questions like: Who currently owns this task? What document is still missing? Which approval is blocking progress?

The documents that tend to cause the most delays are usually insurance certificates, tax forms, banking information, and compliance/security questionnaires because they expire, change frequently, or require verification.

When comparing multiple vendors, many procurement teams still use spreadsheets to evaluate:

Pricing Lead times Payment terms Service levels Risk factors Contract terms

The most frustrating part is often that the information comes from multiple sources and formats, making side-by-side comparisons difficult and time-consuming.

If there is one recurring theme, it is that supplier onboarding is rarely delayed by a single issue. It is usually the combination of document collection, compliance reviews, and lack of process visibility that creates the biggest bottlenecks.