Budget Pack: Basis of Preparation and Audit Trail

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Staff Costs and FTE Budget, current year and three-year plan.

Source of truth: Staff Costs & FTE Budget Model v2.4.xlsx
Prepared by Donna Graham · generated 02 August 2026
The Excel workbook is the single source of truth. This document is the evidence that every figure in the pack traces back to it.

1. Assurance

Two automated controls stand between the workbook and every output. Neither is optional: the pipeline cannot produce a pack unless both pass, so the existence of this pack is itself evidence they did.

Reconciliation passed   Engine parity passed

Reconciliation gateThe extract is tied back to the workbook's own summaries: FTE by cost centre and month, total FTE by month, total cost by budget year, and all 246 position-year component sums. Every check to the penny. Enforced as a hard gate.
Engine parityThe interactive tools recompute cost from the workbook's driver values and reproduce all 20,664 monthly component cells exactly, so no output can silently disagree with the model.

2. Figures, and where they come from

Every figure below is the reconciled workbook total. Nothing here is a parallel calculation.

Current year 2025/26AmountBasis
Actuals to date£3,482,030periods 1 to 9
Forecast£1,007,107periods 10 to 12
Outturn£4,489,137actuals + forecast
Approved budget£4,679,89676 positions
Variance-£190,759-4.1% underspend
Budget yearsTotal costMovement
2026/27£4,870,487outturn to budget
2027/28£5,108,281+4.9% on prior
2028/29£5,343,928+4.6% on prior
Three-year total£15,322,696

3. Assumptions applied

Read from the workbook's assumption set. Employer NI is charged on Basic, Bonus and Car Allowance above the secondary threshold of £417 per month; pension is excluded from the NI base, as it is not NICable.

Assumption2026/272027/282028/29
Pay award (general uplift)3.0%3.0%3.0%
Employer NI rate15.0%16.0%16.0%
DC pension (employer)8.0%8.0%8.0%
DB pension (employer)16.0%16.0%16.0%
Bonus achievement75.0%75.0%80.0%

4. Basis, inclusions and known limitations

What is applied, what is not, and why. Stated plainly so a reviewer's first question already has an answer.

5. Controls and quality checks

The two gates above run on every build. The checks below are the standing controls on the workbook, designed to catch the errors that overstate cost without ever producing an error value.

ControlWhat it catches
Reconciliation gateExtract must tie to the workbook by FTE and by cost, to the penny, or the pipeline stops. A hard gate: no output is produced otherwise.
Engine parityThe interactive tools recompute every position's monthly cost from the workbook's own driver values and must reproduce every cell exactly.
Handover double-fundingFlags a blank start date on a row sharing a Position ID with a dated leaver (a role funded twice through a handover).
Legacy DB on a new hireFlags Pension Type DB on any position starting after the current year-end.
Establishment integrityFlags an approved-post count that does not equal the filled count, with no explaining comment (a vacancy or an over-establishment).
Blended NI sanityChecks blended employer NI as a share of NICable pay sits in a sane band (about 13.5% on the current basis).
Living wage floorFlags any living-wage-affected role whose forthcoming-year full-time salary falls below the Real Living Wage floor.
Attribute integrityFlags any establishment attribute (cost-centre, department, grade, group, function) resolving to blank or error.

6. Sign-off

This pack is prepared from the workbook named above. Signing confirms the figures have been reviewed against it.

Prepared by
Donna Graham · 02 August 2026
Reviewed by
Name · date
Approved by
Name · date