TALLYCAT01 / £35 BILLION / REPEATABLE ARITHMETIC
Evidence checked 12 October 2026
Own factual transcription and calculations from published rounded IFS inputs
Source: https://ifs.org.uk/publications/public-service-spending-plans-and-pressures
Amounts: extra annual departmental spending in 2030/31, GBP billion
Components: 11 + 9 + 4 + 11 = 35
Do not substitute the standalone Table 6.2 productivity amount of 12
The £9bn combines health growth and protecting other departments' buying power
Buying power: index 100 in 2027/28, 100 * (1 + annual rate / 100)^3
Scenario 2 other departments: 100 * 0.98^3 = 94.1192
Each scenario has its own starting point, not directly comparable endpoint cash
Fixed-cash price illustration: 100 * 1.085 / 1.121 = 96.7886
Price illustration period: 2024/25 to 2028/29
No probability, service-output forecast, per-person tax bill or cumulative total inferred
The unrounded IFS workbook and exact overlap allocations remain unavailable
Original IFS artwork and private correspondence are excluded
To run: extract this ZIP, then run python calculate.py in its folder
These calculations are our own and provided for checking; no IFS endorsement
Research and production assisted by AI