Multi-Account Tracking & Data Quality
Spreadsheet Tracking
Definition
The use of a manually maintained spreadsheet to consolidate and track portfolio data from multiple sources.
Spreadsheet tracking is a flexible but maintenance-heavy operating model where portfolio truth depends on manual imports, formulas, reconciliations, and update discipline.
Why it matters
It gives full control over what is tracked and how. It also introduces manual error data lag and increasing maintenance burden as the portfolio grows.
What most investors miss
The gap between what the term means and how it is usually applied.
They underestimate the maintenance cost. A spreadsheet that works well at 2 accounts becomes a fragile and time-consuming system at 5.
How to read it
Treat a spreadsheet as a source of data discipline not a scalable portfolio tracking solution. The value is in the structure not the tool.
Multi-account lens
How this term reads differently across brokers and accounts.
Spreadsheet tracking is the most common multi-account workaround but it breaks under the weight of transactions dividends FX and multiple currencies.
Concrete example
What this looks like with real numbers.
Scenario
A portfolio covering 4 brokers, 3 currencies, and 58 positions takes 3 hours of weekly reconciliation. After 22 months, the spreadsheet has 14 formula patches, mis-classifies dividends in EUR as GBP, and understates one broker's cash by 4.1%.
What it reveals
Spreadsheets work well until they become the bottleneck. The real cost is not the hours — it is the confidence discount that accumulates as the model gets patched rather than rebuilt.
Related terms
Terms that connect to spreadsheet tracking.
Reconciliation
The process of checking that transactions balances cash and holdings agree across your records and actual accounts.
Broker Dashboard
The account-level view a brokerage platform provides for the investments held with that specific broker.
Data Lag
The delay between when a transaction or price change occurs and when it is reflected in the portfolio tracking system.
Continue only if the next question is clearer now
Diagnosis first, then workflow, then fit.
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