Busy service does not guarantee safe cash. In small restaurants, one stale payroll assumption can break a month.
If your model still uses last year’s wage logic, this is the week to reset it.
Quick Summary
- Run an 8-week cash-flow model, not month-end guesswork.
- Update labor assumptions before April 2026 wage changes hit payroll.
- Track tax and payroll cash separately from operating cash.
- Use stop rules early instead of emergency discounting.
Why This Matters in the UK Right Now
As of the December 2025 ONS release (published 15 January 2026):
- CPI annual rate: 3.0%
- Restaurants and hotels annual inflation: 3.8%
From 1 April 2026, the UK minimum wage table moves again. National Living Wage (age 21 and over) is GBP 12.71 per hour.
From 6 April 2026, employer NIC settings for 2026-27 include a 15% Class 1 secondary rate with updated thresholds.
For owner-operators, that means pricing and cash planning must include loaded payroll, not wage headline only.
The Core 8-Week Formula
closingCash = openingCash + cashIn - cashOut
cashOut = payrollLoaded + suppliers + rent + utilities + debt + taxReserve + otherFixed
Keep this weekly. If you only check monthly, corrective actions arrive too late.
Worked Example (Week 1)
Assumptions:
- Opening cash: GBP 22,400
- Cash in (net settlements): GBP 16,950
- Payroll (loaded): GBP 6,780
- Suppliers: GBP 4,920
- Rent and utilities: GBP 2,460
- Debt service: GBP 620
- Tax reserve transfer: GBP 900
- Other fixed: GBP 1,150
closingCash = 22,400 + 16,950 - (6,780 + 4,920 + 2,460 + 620 + 900 + 1,150)
= 22,400 + 16,950 - 16,830
= GBP 22,520
Positive week, but barely flat. That is a warning sign, not a win.
Wage-Change Impact Line (Add This Row)
weeklyWageUplift = (newRate - oldRate) x affectedHours
Example:
- Old modeled rate: GBP 11.44
- New modeled rate: GBP 12.71
- Affected weekly hours: 260
weeklyWageUplift = (12.71 - 11.44) x 260 = GBP 330.20
If you do not recover that in pricing, mix, or productivity, your 8-week runway shrinks automatically.
30-Minute Weekly Cash Routine
- Update actual settlements by channel.
- Post payroll as loaded cost, not gross wage only.
- Transfer tax reserve first.
- Compare planned vs actual closing cash.
- Trigger stop rule if closing cash is under target.
Stop Rules You Can Use
- Two consecutive weeks below minimum cash floor.
- Supplier terms stretched beyond agreed cycle.
- Payroll plus supplier outflow exceeds 80% of weekly cash in for 2 weeks.
When a stop rule triggers, cut leakage first: discount abuse, low-margin modifiers, and unprofitable dayparts.
Common Mistakes
- Using profit reports as cash-flow reports.
- Ignoring payroll loading and NI effects in weekly planning.
- Waiting for month-end to react.
- Using one blended food-cost assumption across all channels.
Related Guides
- UK Restaurant Menu Pricing Guide
- UK Restaurant Labour Cost Calculator
- UK Restaurant Prime Cost Calculator
- Menu Price Review Checklist
- Break-Even Sales Calculator
KitchenCost helps you recost recipes and menu floors quickly, so your weekly cash model uses current numbers.
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