Cash Flow Management Software UK 2026: Float, Fluidly, Agicap, Pulse

Cash flow management is the financial discipline most directly linked to business survival. The majority of UK business insolvencies occur not because the business is fundamentally unprofitable but because it runs out of cash at a critical moment - an overdue customer payment, an unexpected VAT demand, or a seasonal revenue trough that the working capital position cannot absorb. Cash flow forecasting software converts the live data from a business's accounting platform into a forward-looking cash position model, allowing the finance director or owner-manager to see where the cash gaps are before they become crises. The UK market for dedicated cash flow tools has grown significantly since 2020, driven by the pandemic-era focus on cash preservation and the subsequent credit tightening that made timely cash visibility a board-level priority. This guide covers what cash flow management software does, how the leading platforms compare, and the legal tools available to UK businesses for protecting their incoming cash flows from late-paying customers.

How Cash Flow Forecasting Software Works

Cash flow forecasting tools work by connecting to the business's accounting platform via Open Banking or direct API integration, importing the chart of accounts, existing invoices, bills, and bank transactions, and projecting these forward over a defined horizon - typically 13 weeks for operational cash management and 12 months for strategic planning. The forecast distinguishes between committed cash flows (invoices raised and not yet paid, bills approved and due for payment) and projected cash flows (recurring revenues and costs modelled from historical patterns or manually entered assumptions).

Float, the most widely used dedicated cash flow tool in the UK market, integrates directly with Xero and QuickBooks (and to a lesser extent Sage) to import the full debtor and creditor ledger, allowing the forecast to reflect the actual invoice-level payment expectations rather than a generic turnover assumption. Agicap targets mid-market businesses with more complex treasury requirements, offering multi-entity consolidation and banking integration via Open Banking alongside the accounting platform connection. Fluidly uses machine learning to predict payment timing based on historical customer payment behaviour - identifying which customers typically pay early, on time, or late, and adjusting the forecast accordingly rather than assuming all invoices are paid on the due date.

The accuracy of any cash flow forecast depends on the quality of the underlying accounting data. A business with a clean, up-to-date ledger - invoices raised promptly, bills coded correctly, bank reconciliation current - will produce a reliable forecast. A business with three months of unreconciled transactions and unissued invoices for work already completed will produce a forecast that substantially misrepresents the true cash position. Cash flow software is a tool that amplifies the quality of the accounting records it draws from, not a substitute for timely bookkeeping.

The Late Payment Framework: Legal Tools for Protecting Cash Flow

The Late Payment of Commercial Debts (Interest) Act 1998 gives businesses the statutory right to charge interest at 8% above the Bank of England base rate on overdue commercial invoices, plus fixed debt recovery costs. These rights apply automatically to all B2B transactions where a payment date has been agreed or where 30 days have elapsed without agreement. The Act is frequently cited but rarely enforced: the commercial relationship risk of charging statutory interest to a customer who represents ongoing revenue deters most businesses from exercising their rights.

The Prompt Payment Code, administered by the Small Business Commissioner, requires signatory businesses to pay suppliers within 60 days as a maximum, with the aspiration of 30-day terms for smaller suppliers. Signatories include major UK corporates and public sector bodies; the code carries reputational rather than legal weight, but the Small Business Commissioner has powers to investigate and publicise persistent late payers. Businesses in the supply chain of Prompt Payment Code signatories can reference the code in payment chasing communications as a compliance obligation on the customer.

For businesses supplying the public sector, the 30-day payment obligation under the Public Contracts Regulations 2015 (now the Procurement Act 2023) applies throughout the supply chain. A main contractor receiving a public sector contract must include a 30-day payment term in its subcontracts and pass the payment through within 30 days of receiving cleared funds from the public sector buyer. Cash flow forecasting software that tracks public sector receivables separately from private sector debtors and applies the statutory 30-day timeline helps businesses identify breaches of the obligation by their customers and escalate promptly.

Platform Comparison: Cash Flow Management Software

Scenario Modelling: Planning for Cash Gaps

The core operational value of cash flow software beyond a static forecast is scenario modelling: the ability to create alternative versions of the forecast based on different assumptions and compare the cash impact of each. A business negotiating a large contract might model three scenarios: the deal closes in 30 days and the first payment arrives in 60 days; the deal closes but payment is delayed by 90 days; the deal does not close and the pipeline converts at 50% of forecast. Each scenario produces a different minimum cash balance over the forecast period, revealing whether the business needs additional working capital finance to bridge any scenario - and by how much.

Float's scenario modelling allows multiple named scenarios to be created and compared side-by-side on a single chart, with the forecast updating automatically when accounting data changes. This makes it practical for finance directors to refresh scenario models weekly rather than spending hours rebuilding spreadsheets. For businesses working with an external accountant or FD, the ability to share a scenario model via a client login - without giving the accountant full access to the accounting platform - is a useful feature that Float and Agicap both provide.

Debtor Management and Cash Collection

Cash flow software that integrates with the accounting platform's debtor ledger can identify overdue invoices and their expected impact on the cash forecast, prioritising credit control activity on the invoices whose collection would most improve the near-term cash position. Some platforms (Fluidly, Agicap) include automated payment reminder workflows that send configurable reminder emails to customers at defined intervals before and after the invoice due date - reducing the credit controller's manual workload while maintaining the professional relationship with the customer.

The Prompt Payment Code's performance reporting requirements - Prompt Payment Code signatories must report their payment performance annually - create an incentive for larger companies to pay suppliers on time. Cash flow software that tags debtors as Prompt Payment Code signatories and applies a different expected payment timeline to those customers (based on the code's 30-day commitment) produces a more accurate forecast than one that applies the invoice due date uniformly across all customers regardless of their payment behaviour.

FAQ

What is a 13-week cash flow forecast and why is it used?

A 13-week (rolling quarter) cash flow forecast is the standard operational cash management tool used by finance teams and restructuring advisers. It covers a near-term horizon where individual cash flows can be identified with reasonable certainty - specific invoices due for payment, known supplier payments, payroll dates, and VAT payment obligations. Beyond 13 weeks, forecast uncertainty increases and a higher-level 12-month or annual forecast is more appropriate for strategic planning. Banks and invoice finance providers typically request a 13-week forecast when assessing a business's short-term funding needs.

Can cash flow software replace a finance director?

No. Cash flow software automates the data aggregation and projection calculations that a finance director would otherwise perform manually, but it cannot replace the judgement required to interpret the forecast, identify the appropriate management response to a cash gap, and negotiate with lenders or suppliers to resolve a liquidity issue. For owner-managed businesses without a full-time finance director, cash flow software provides a level of financial visibility that would otherwise require significant manual effort - but the business owner still needs to understand the output and act on it.

How does the Late Payment of Commercial Debts Act apply to consumer sales?

The Late Payment of Commercial Debts (Interest) Act 1998 applies to contracts for the supply of goods or services between businesses, where both parties are acting in the course of business. It does not apply to sales to consumers (individuals purchasing for personal use). A business selling exclusively to consumers has no statutory right to late payment interest under the Act; it may include contractual interest provisions in its terms and conditions, but these must comply with the Unfair Contract Terms Act 1977 to be enforceable.

What is the Small Business Commissioner and how can it help with late payment?

The Small Business Commissioner is an independent public body established under the Enterprise Act 2016 to help small businesses resolve payment disputes with larger business customers. It can investigate complaints from small businesses about late payment, issue recommendations, and publish reports naming persistent late payers. The Commissioner administers the Prompt Payment Code. While the Commissioner cannot compel payment, its involvement often resolves disputes that have stalled through bilateral communication, and the reputational risk of a published finding deters larger companies from ignoring its process.

Does cash flow forecasting software work for seasonal businesses?

Yes - seasonal businesses are among the most important users of cash flow forecasting tools, precisely because their revenue and cost timing is predictable from prior-year data but their peak-to-trough cash swings are large. A hospitality business with 60% of annual revenue in three summer months needs to forecast the cash drain of the quiet season months against the reserves built during the peak, and identify whether additional working capital is needed to bridge the winter trough. Float and Agicap both allow historical data to be used as the basis for seasonal projections, which are then adjusted for current-year assumptions on trading volume and cost levels.

How We Verified

This article draws on the Late Payment of Commercial Debts (Interest) Act 1998, the Prompt Payment Code administered by the Small Business Commissioner, the Enterprise Act 2016, the Procurement Act 2023, and publicly available product information from Float, Fluidly, Pulse, Agicap, and Cashforce as of May 2026. No vendor has paid for inclusion or editorial placement.

Sources

• Late Payment of Commercial Debts (Interest) Act 1998 - legislation.gov.uk
• Small Business Commissioner - GOV.UK
• Enterprise Act 2016 - legislation.gov.uk
• Prompt Payment Policy - GOV.UK