Automated UK Tax
Input your VAT stagger group once. The engine automatically drops HMRC liabilities into the exact week they are due.
The 13-Week Cashflow Forecast
That Updates Itself.
Escape the Friday 'Save As' nightmare. Get a CFO-engineered Google Sheet with a custom 1-click script that automates your weekly roll-forward and UK tax scheduling. Stop paying for £1,200/year SaaS. Own your data forever.
No Monthly Subscriptions• 100% Data Privacy• CFO Developed
From cashflow anxiety to absolute clarity.
Stop manually dragging cells around and hoping the math is right. The Engine is designed to give founders immediate answers to their most terrifying cashflow questions.
1. The 5-Minute Setup
Select your VAT stagger group from the dropdown and drop in your current bank balance. The Engine instantly configures itself to your specific tax calendar.
2. The Engine Automates
The script automatically calculates your PAYE, Corporation Tax, and VAT liabilities, dropping them perfectly into the exact weeks they are due to HMRC.
3. Best & Worst Case Scenarios
Toggle between 'Best Case', 'Expected', and 'Worst Case' with a single click. Instantly stress-test your runway to see exactly what happens if a major client delays payment by 30 days.
Software-grade automation.
Spreadsheet control.
Three pillars that separate this from every free template on the internet.
1-Click Scenarios
Stress-test your runway. See how a 20% drop in sales impacts your cash balance instantly.
The 1-Click Weekly Roll
Stop the "Save As" nightmare. Our custom Google Script handles the weekly roll-forward, archiving the past week and opening up the new one in a single click. No broken links, no manual dragging.
Escape the SaaS trap. Skip the free templates.
You don't need a £2,400/year software subscription to know your runway, but you can't afford to run your business on a broken free template.
Free Templates
£0
- Manual data entry every week
- Ignores HMRC VAT stagger groups
- One broken cell ruins the forecast
- Unsecured/Unverified logic
The Sweet Spot
13
The Engine
£147+ VAT
One-time payment
- Automated HMRC tax scheduling
- Dynamic Best/Worst case scenarios
- 100% Private (Lives in your Drive)
- Locked formula architecture
- Centralized assumptions control
Bloated SaaS
£200++ VAT
Every single month
- Costs £2,400+ per year
- Requires messy Xero integrations
- Data stored on their servers
- Overwhelming/Complex setup
Engineered for UK VAT-Registered Businesses
Consultancies
E-Commerce
Digital Agencies
Property Dev
Financial Services
Note: This tool is engineered for businesses with £100k – £5m turnover. If you are a pre-revenue hobbyist, this is likely overkill.
The consensus from the C-Suite.
Built for pragmatists, not software tourists.
"I've built a dozen of these in Excel over the years, but keeping the PAYE and VAT formulas updated was a nightmare. The way this locks the tax logic into the background is exactly what we needed. Saves me about two hours every Friday."
Finance Director, 15-Person Agency
"Futrli was complete overkill for what we actually look at in our Monday board meetings. We just needed to know our 13-week cash low-point and if the Corp Tax was covered. This engine does exactly that without the bloated dashboards."
Operations Manager, D2C Brand
"It doesn't try to replace our accountant; it just stops me from having a panic attack about the VAT quarter-end. Dropping the raw numbers into the Assumptions tab takes 5 minutes. Solid piece of kit."
Founder, B2B Consultancy
The Engineering Philosophy.
In B2B finance, accuracy is not a luxury; it is the baseline requirement. We engineered this tool to bridge the gap between bloated software and fragile spreadsheets, removing the most common failure points in cash management.
Immutable ArchitectureLocked formulas mean you can't accidentally break the math or ruin the forecast by dragging a cell.
Zero Human ErrorBy hardcoding UK VAT stagger groups, PAYE schedules, and Corp Tax logic, we eliminate manual tax scheduling errors.
100% Data SovereigntyThis is not a SaaS. It lives securely in your Google Drive. We never see, store, or have access to your data.
"A stress-tested financial environment designed for serious operators who demand immediate clarity, without the SaaS overhead."
Henry
Lead Architect & Financial Analyst
Common Questions
Everything you need to know about deploying the Engine.
You are always in complete control. The Engine features a centralized 'Assumptions' dashboard. If the Chancellor changes the Corporation Tax rate, you simply type the new percentage into one box, and your entire 13-week forecast instantly recalibrates. No waiting for software updates.
Yes. Because the Engine uses custom Google Apps Script to automate your 1-click weekly roll-forward, Google will ask for your permission to run it the first time. This is standard procedure for any sheet with automation. You are granting permission to your own script, within your own private sheet. We never have access to your data.
Yes. This is the Engine's most powerful feature. You can map out 'Best Case', 'Expected', and 'Worst Case' scenarios. With one click, you can switch between them to see if you still have enough runway if your revenue drops by 20% next month.
Less than 5 minutes. You simply select your VAT stagger group from a dropdown, input your starting bank balance, and the Engine immediately builds out your customized 13-week runway.
It acts as a clean, independent command center. Instead of relying on messy API connections that often break or pull in duplicate data, you just drop your top-line numbers into the Engine to get a perfectly uncorrupted forecast.
100% private and secure. Because this is built strictly on Google Sheets, the Engine lives entirely inside your own private Google Workspace. We have zero access to your numbers, clients, or runway data.
Get the Engine.
No subscriptions. No hidden fees. 100% tax deductible.
One-time purchase
£147+ VAT
Costs less than a single month of standard forecasting software.One-time payment. Own your data forever.
- Lifetime access — pay once, use forever
- Google Sheets exclusive (Not Excel compatible)
- Instant digital download
- 100% tax-deductible business expense
Secure checkout. Instant access.