Ramp Metric
Finance
Vendor Diversification Index = 1 - Sum of (Vendor Spend / Total Spend)^2
Vendor Diversification Index measures how evenly your spend is distributed across the vendors you pay through Ramp, rather than concentrated in a handful of suppliers. Using Ramp transaction and bill payment data tagged by merchant or vendor, it scores spend concentration so a high index reflects a broad, balanced supplier base and a low index flags dependency on a few vendors. It turns raw vendor-level spend into a single signal of supplier risk.
Full guide: definition, formula, and benchmarksRampFinanceVendor Diversification Index
Vendor Diversification Index measures how evenly your spend is distributed across the vendors you pay through Ramp, rather than concentrated in a handful of suppliers. Using Ramp transaction and bill payment data tagged by merchant or vendor, it scores spend concentration so a high index reflects a broad, balanced supplier base and a low index flags dependency on a few vendors. It turns raw vendor-level spend into a single signal of supplier risk.
How to calculate vendor diversification index
Why vendor diversification index matters for Ramp users
When a large share of spend in Ramp flows to one or two vendors, the business carries hidden risk. A price rise, an outage, or a contract dispute with a single supplier can disrupt operations and force rushed, expensive replacements. Tracking diversification gives finance an early read on that exposure before it becomes a crisis.
A healthy index also strengthens negotiating leverage and budgeting discipline. It shows where spend has crept towards one provider, where consolidation might cut cost, and where dependency is too deep to be comfortable. Reading it from Ramp data means the picture reflects what you actually pay, not what a contract register says you should.
Understand and act on vendor diversification index with KPI Tree
Sync your Ramp transaction and bill payment data into your warehouse and compute the index in KPI Tree, grouping spend by vendor over a rolling period. Link it inside a metric tree to related signals like card spend distribution and average transaction value, so a shift in concentration can be traced back to the vendors and categories driving it.
Assign RACI ownership in KPI Tree, typically to a finance lead or procurement owner who is accountable for supplier risk, and set a quarterly review cadence. KPI Tree keeps the index next to its drivers and the people responsible, so a concentration warning turns into a clear action rather than a number nobody owns.
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Related Ramp metrics
Card Spend Distribution
Expense ManagementMetric Definition
Card spend distribution breaks down total card expenditure by card type - physical, virtual, and department-level cards - and by spending band. It reveals how concentration or fragmentation of spend across card instruments affects control and visibility.
Average Transaction Value
Expense ManagementMetric Definition
Average Transaction Value = Total Spend / Number of Transactions
Average transaction value measures the mean monetary amount per expense transaction processed through Ramp. It provides a baseline for identifying unusual spending patterns and understanding typical purchase behaviour.
Budget Adherence Rate
Expense ManagementMetric Definition
Budget Adherence Rate = (Categories Within Budget / Total Budget Categories) × 100
Budget adherence rate measures the percentage of budget categories where actual spending remains within the allocated amount. It quantifies organisational discipline in following financial plans.
Burn Rate
Expense ManagementMetric Definition
Monthly Burn Rate = Total Monthly Expenditure
Monthly burn rate is the total net cash expenditure per month, encompassing all operating expenses processed through Ramp. It is a critical metric for startups and growth-stage companies managing runway.
Explore vendor diversification index across integrations
All Ramp metrics
Average Transaction ValueBudget Adherence RateBudget Utilisation RateCard Activation RateCategory Spend AnalysisCompliance Violation RateDepartment Spend AnalysisDuplicate Payment DetectionEmployee Reimbursement TimeExpense Approval Cycle TimeExpense Per EmployeeMaverick Spend RateMerchant Concentration AnalysisBurn RateOut-of-Policy Spend RatePayment Cycle TimeReceipt Compliance RateRecurring Spend AnalysisSavings Identification RateSpend by Vendor AnalysisSpend Forecast AccuracySubscription Waste DetectionT&E Spend RatioTotal Spend Under ManagementVirtual Card Adoption RateAccounting Integration AccuracyBill Payment Cycle TimeCard Spend DistributionExpense Fraud Detection RateReconciliation TimeSpend Anomaly DetectionVendor Consolidation SavingsBudget Variance AnalysisCard Fraud Detection RateCard Utilization RateCash Flow Impact AnalysisCost Center Efficiency AnalysisDepartment Spending TrendsDuplicate Transaction Detection RateEmployee Spending Behavior AnalysisExpense Categorization AccuracyLocation Based Spend AnalysisMonthly Spend VelocityPolicy Violation RateReimbursement Processing TimeSeasonal Spending PatternsSpend Category AnalysisSpend Program EffectivenessTransaction Volume Growth RateVendor Concentration RiskVendor Payment Terms AnalysisVendor Performance ScoringEmpower your team to understand and act on Ramp data
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