Vendor Tracker: Spot Overpayments Before the Audit

Vendor relationships decay invisibly. The agency you hired two years ago still gets paid $8,000 a month; nobody has checked what they deliver in six months. The SaaS tool that was central in 2023 is used by two people now but still renews every year. The supplier you pay on net-30 now pays you on net-60 and nobody renegotiated.

Connecting QuickBooks, Google Drive, and email to Claude through CorpusIQ makes vendor health a 30-minute monthly review instead of an annual audit that never quite happens.

The three patterns that cost money

Most vendor waste falls into three buckets.

Duplicate or overlapping services. Two project management tools. Two analytics platforms. Three email marketing tools across different departments. Nobody decided to have them all; they accumulated.

Unused subscriptions. A tool that was evaluated and left running. The team moved on. The subscription renews. Sometimes for years.

Drifted pricing. Vendor raised prices quietly. Operator did not notice because the change was gradual or buried in a renewal.

The total is usually 3-8% of vendor spend. At $10M in revenue with $2M in vendor spend, that is $60k-$160k a year recoverable.

The monthly vendor review

Run one prompt a month.

Pull the top 50 vendors by total paid amount in QuickBooks over the last 12 months.

For each vendor:
1. Monthly or annual spend pattern
2. Most recent contract or invoice in Drive
3. Last 90 days of email with this vendor (response cadence, any tone change, 
   any issues raised)
4. Any payments that look anomalous: doubled months, missed months, sudden 
   increases

Produce:
- Vendors where spend has increased more than 20% without obvious justification
- Vendors where we have not had email contact in the last 60 days (dying 
  relationship or pure subscription renewal)
- Vendors with contracts that expire in the next 120 days
- Any duplicate services (two vendors in the same category)
- Any SaaS subscription with low apparent usage based on internal mentions in 
  email

Claude returns the health list. You review, investigate, and act.

What action looks like

Three actions per flagged vendor.

Keep: service is essential, price is fair, relationship is healthy. No action.

Renegotiate: service is essential but price has drifted. Use the contract expiration window or the next payment cycle to ask for a discount or an adjusted scope. Data from QuickBooks shows exactly what you have paid; contract from Drive shows what was promised.

Cancel: service is not essential, or is duplicative with another vendor. Cancel and notify before the next renewal window.

Three actions is all. The skill is being decisive. The default of "leave it alone" is what caused the drift.

The case for email as a signal

Payment data alone misses the softest signal: the relationship is dying.

A healthy vendor relationship has regular email. QBRs, check-ins, occasional problem-solving, occasional price discussions. When the email goes quiet, one of three things is true: the vendor has stopped caring, your team has stopped caring, or the tool is pure infrastructure you do not need to discuss.

Any of those is a signal. Claude can surface which is which by reading tone and cadence across the last 90 days.

How to set it up

1. Sign up at corpusiq.io. Solo $29.95/month.
2. Connect QuickBooks Online.
3. Connect Google Drive or Dropbox for contracts.
4. Connect Gmail or Outlook.
5. Add CorpusIQ MCP to Claude.

Sample prompts for specific vendor questions

• "For vendor [NAME], show me the 12-month payment history and flag any anomalies."
• "Which vendors have had more than 2 invoices rejected or disputed in the last year?"
• "Find vendors we pay monthly but have not sent us an invoice in the last 90 days."
• "Compare the contract price for [VENDOR] in Drive against what we actually paid last year."
• "List every SaaS subscription we pay over $500/month. For each, summarize what the tool does and whether it appears in Slack or email discussions."
• "Which vendors have annual auto-renewals coming up in the next 90 days?"
• "Find any vendor where the last email exchange mentions a price increase."

What this does not catch

Some waste requires process, not software.

A service that is genuinely under-used but not surfaced in email or contract scans stays invisible. Someone has to actually compare "what we pay" to "what we use" for some subscriptions, and Claude cannot measure usage for every tool.

Off-contract procurement. If a team is paying for a service via a personal credit card rather than through QuickBooks AP, Claude cannot see it. Audit your expense reimbursement process separately.

The vendor review process catches most of the structured waste. It is a high-ROI activity that CorpusIQ makes fast enough to actually run.

See also

• Contract Intelligence Suite: Never Miss a Renewal Again
• Connect QuickBooks to Claude: Close Your Books 4x Faster
• Scope Drift Detection: Catch Revenue Leakage Across Drive, Email, and QuickBooks