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FinTech SME Cashflow Forecasting Platform — UK Challenger Bank

UK6 min readUpdated June 2025
Region
UK
Contract
Fixed Price
Tech Stack
9 Technologies
IP
100% transferred

Project Overview

A UK FCA-authorised challenger bank serving 28,000 SME clients wanted to build a cashflow forecasting platform...

Technology Stack

React NativePython/FastAPIPostgreSQLTrueLayer AISPHMRC MTD APIXero APIQuickBooks APIPyTorch (LSTM)AWS eu-west-2

Compliance & Standards

FCA Consumer Duty (voluntary)UK GDPRPSD2/Open BankingHMRC MTDCyber Essentials
Step 01

The Challenge

A UK FCA-authorised challenger bank serving 28,000 SME clients wanted to build a cashflow forecasting platform — using Open Banking transaction data, invoice data, and payroll data to provide 13-week rolling cashflow forecasts. FCA Consumer Duty (SME banking is not Consumer Duty for micro-businesses, but the bank extended it voluntarily), UK GDPR for SME financial data, PSD2 AISP data sharing, and HMRC Making Tax Digital (MTD) data integration were the requirements. Budget: £100,000.

Step 02

Our Approach

TrueLayer AISP

business current account, business savings, business credit card transactions (12 months history, daily refresh).

HMRC MTD VAT API

VAT return history (quarterly liability) as a proxy for business revenue pattern.

Xero/QuickBooks API

invoice data (open invoices as receivables, supplier invoices as payables).

Data normalisation

all data sources normalised to a weekly cashflow category taxonomy (receipts, payroll, HMRC, supplier payments, bank charges, other). 13-

Forecasting methodology

category-specific algorithms.

Payroll

fixed (known amount and date from payroll data).

PAYE/NI

calculated from payroll data (employer NI + PAYE liability).

VAT

quarterly from MTD return history, smoothed to monthly accrual.

Sales receipts

ML model (LSTM sequence model in PyTorch) trained on 18 months of transaction history — learns business-specific payment timing patterns.

Supplier payments

invoice due dates from Xero/QuickBooks.

Stress test scenarios

what if largest customer is 30 days late? what if three invoices are disputed simultaneously? what if VAT is due in this period?

Each stress scenario

recalculates 13-week forecast with scenario applied, shows minimum cashflow week, and flags if balance drops below a configurable safety threshold.

Alert

  • if forecast shows negative cashflow in any week within 4 weeks, bank sends in-app notification to SME owner.
  • FCA Consumer Duty (Voluntary Extension): The bank voluntarily applied FCA Consumer Duty principles to all SME clients.

Consumer Support

cashflow alert triggers proactive outreach from SME relationship manager.

Consumer Understanding

forecast explanations in plain English ("Your lowest cashflow week is forecast for 14–20 March because your VAT payment is due and your two largest invoices are not expected to be paid until after that date").

Products and Services

credit facility upsell only surfaced when cashflow forecast shows genuine stress.

Step 03

The Results

Platform live at 14 weeks, £92,000 — under budget.

SME engagement: 68% of enrolled SMEs checking forecast weekly (industry benchmark: 20% weekly app engagement).

Early cashflow stress alerts: 340 SMEs received alerts in first 6 months87% accessed credit facility or took action before reaching negative cashflow.

SME churn: 18% reduction in SME accounts closed.

Consumer Duty voluntary review: bank's voluntary Consumer Duty application to SMEs cited as industry best practice by FCA Innovation team.

Client Testimonial
340 SME early warnings in 6 months — 87% of them acted before reaching negative cashflow. That is the product. Without the forecast, they would not have known until their bank account was empty. The FCA Innovation team cited our voluntary Consumer Duty extension as industry best practice. That is a better outcome than we expected." — Chief Product Officer, UK Challenger Bank (name withheld)
ClickMasters Case Study Team
Reviewed by James Whitmore, CTO

Project Details

Sector
FinTech
Country
UK
Status
On Time
Contract
Fixed Price
Tech Stack
9 Technologies
Reading Time
6 min
IP Ownership
100% transferred
Last Updated
June 2025
Written By
ClickMasters Case Study Team
Reviewed By
James Whitmore, CTO

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