UTXO Age Distribution
Absolute volume of unspent transaction outputs by age bracket - BTC view reveals aggregate capital immobilization.
What is it?
UTXO Age Distribution classifies every unspent output on the Bitcoin network by the time elapsed since its creation, split into 12 age bands (from less than one day to over 10 years). It shows the evolution of the holding structure over time: how much BTC sits in each age bracket, and how these proportions shift across market cycles. It is an X-ray of the network revealing the maturity profile of circulating supply. Trinity computes this metric directly from the UTXOs on a Bitcoin full node.
How to read
The chart offers three visualisation modes: percentage (%), native BTC, and USD value - selectable via the buttons in the top-right corner. In % mode, stacked bands total 100%: warm colours (bottom) represent young coins, cool colours (top) represent old coins. In BTC and USD modes, the stacking shows absolute volumes. Use the band selector dropdown to isolate a single age bracket as a line chart with BTC price overlay - ideal for studying the correlation between a specific holder cohort and price. Click on the legend to hide/show individual bands.
Key zones
The 1-2 year bracket is often considered the boundary between short-term and long-term. A significant peak in the 3-5 year bracket may indicate coins accumulated during the previous cycle. Extreme brackets (> 7 years) potentially include lost coins whose private keys are no longer accessible.
What to observe
Observe mass shifts between brackets from one period to another. A sudden draining of the 1-2 year brackets into < 1 month brackets marks a 'wake-up' of mature coins. Bimodality in the distribution (two distinct peaks) has historically been associated with transition phases between cycles.
Historical context
After each halving, a progressive concentration of supply in the 1-3 year brackets is typically observed, reflecting post-bear-market accumulation. These coins then mature into the 3-5 year brackets during the following bull run. The 2022-2024 cycle showed a peculiarity: coins in the 2-3 year bracket were exceptionally stable, possibly due to increased institutional custody.
Expert notes
The distinction between 'lost coins' and 'intentionally held coins' remains impossible to make on-chain. Estimates of lost coins (often cited between 3 and 4 million BTC) are approximations based on prolonged inactivity. UTXO analysis by age bracket is the foundation on which most other metrics in this category are built - understanding its limits is essential for correctly interpreting derived metrics.
Common mistakes to avoid
Interpreting very old coins (> 7 years) as 'whales waiting' is misleading - a significant proportion of these UTXOs likely correspond to permanently inaccessible coins (lost keys, Satoshi's addresses, etc.). Additionally, exchange movements can create very young UTXOs in massive volume that do not reflect a genuine change of ownership.
Programmatic access
REST API
curl -sS \
'https://api.trinityinsights.io/api/v1/onchain/utxo-age-distribution/history?days=90' \
-H 'X-API-Key: $TRINITY_API_KEY'MCP server
{
"tool": "get_chart_value",
"metric_id": "utxo-age-distribution",
"timeframe": "1y"
}Required tier: free. See the pricing grid for the tier list and the MCP documentation for multi-client configuration.
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Institutional disclaimer
Trinity Insights is an educational and analytical tool. The metric above does not constitute investment advice. Trinity Insights is not a Crypto-Asset Service Provider (CASP) registered under MiCA Regulation (EU) 2023/1114. See the full disclaimer.