Every year Philadelphia's transit agency septa{% capture sidenote %}SouthEastern Pennsylvania Transportation Authority.{% endcapture %}{% include "sidenote.liquid" %} publishes budget figures.{% capture sidenote %}The reports page with many PDFs for download including the 2021 budget: https://planning.septa.org/reports/ (archived link).{% endcapture %}{% include "sidenote.liquid" %} There is a lot of information in the document, both a high level table and many further breakdowns.
I thought it would be interesting to read through the numbers and build a Sankey diagram{% capture sidenote %}https://en.wikipedia.org/wiki/Sankey_diagram{% endcapture %}{% include "sidenote.liquid" %} showing several levels of expenses and revenue broken down by category. Starting at the highest level this is the top level budget for the entire organization: ### 2021 Budget Breakdown Revenue | Amount in Thousands :------------------------------- | ------------------: Passenger Revenue | 480,574 Shared Ride Program | 16,250 Other Income | 42,188 Investment Income | 2,756 | --------- *Total Operating Revenue* | 541,768 Subsidy | :------------------------------- | ------------------: Federal | 93,028 State | 779,377 Local | 112,451 Other | 4,360 | --------- *Total Subsidy* | 989,216 Expenses | :------------------------------- | ------------------: Labor and Fringe Benefits | 1,088,773 Material and Services | 331,432 Injury and Damage Claims | 24,711 Propulsion Power | 27,313 Fuel | 26,026 Vehicle and Facility Rentals | 8,854 | --------- *Operating Expense* | 1,507,109 Depreciation/Contributed Capital | 23,875 | --------- **Total Expenses** | **1,530,984** Note that the subsidies (mostly from the state of Pennsylvania) exactly cover the gap between expenses and revenue. I found the high level table a little lacking in detail, so I read further and tried to pull out numbers from the various breakdown tables in the document and align them to the overview table so we can see more detail of where money is coming from and where it's spent. Here is a visualization of the budget as a Sankey diagram: