Published by the Uniflow AI editorial team
What should startup runway planning software help you model?
Startup runway planning software should connect opening cash, revenue drivers, hiring dates, operating costs, taxes, fundraising, and ownership changes in one forward-looking model. A runway forecast estimates how long a startup can operate before its cash is exhausted under stated assumptions.
The US Small Business Administration counted 33.3 million small businesses in its 2023 profile, while the Federal Reserve reported that 59% of employer firms applied for financing during the previous 12 months in its 2024 Small Business Credit Survey. These figures show why cash planning and financing decisions matter across a large operating environment.
Paul Graham, co-founder of Y Combinator, writes, “A startup is a company designed to grow fast.” Our analysis therefore treats runway planning as an operating model, not simply a historical accounting report.
How do you build a defensible startup runway forecast?
A defensible forecast starts with reconciled cash and then adds drivers for revenue, hiring, costs, scenarios, financing, and decision thresholds. The Financial Reporting Council’s Guidance on Going Concern, published in March 2023, supports examining whether an organisation can continue operating through forward-looking financial information.
Use this sequence to turn a basic cash estimate into a decision model:
- Establish opening cash. Use bank balances and reconciled accounting data rather than an assumed figure. Cash-flow forecasts track receipts and payments, not only accrual revenue and expenses.
- Build revenue drivers. Separate customers, conversion, pricing, recurring revenue, churn, expansion, payment timing, and collections where possible.
- Add hiring timing. Give every role a start date, salary, employer taxes, benefits, recruiting cost, equipment cost, and ramp assumption.
- Separate fixed and variable costs. Model software, contractors, infrastructure, marketing, rent, professional fees, payroll, and taxes using appropriate drivers.
- Create base, downside, and upside cases. A pricing case should change price alongside conversion, churn, payment timing, and related costs.
- Calculate monthly cash and runway. Cash divided by monthly net burn provides a basic runway measure, but a month-by-month model is more useful when hiring and funding events occur on specific dates.
- Add fundraising and dilution. Include pre-money valuation, new capital, post-money valuation, option-pool treatment, and ownership percentages.
- Set decision thresholds. Examples include starting a fundraise when projected runway falls below a defined level or delaying a hire when a downside case breaches a cash minimum.
- Update actuals and reforecast. Compare actual cash, hiring, revenue, and expenses with the model, then revise assumptions.
Eric Ries describes a startup as “a human institution designed to create a new product or service under conditions of extreme uncertainty.” That uncertainty makes alternative scenarios and regular reforecasting more useful than treating one spreadsheet projection as certain.
Why does hiring timing matter more than an annual salary alone?
Hiring affects runway through timing as well as compensation. A role hired at the beginning of a month has a different cash effect from an identical role hired six months later.
The model should include salary, employer payroll taxes, benefits, recruiting fees, equipment, and ramp time for each role. In the UK, the National Living Wage for workers aged 21 and over was £11.44 per hour from 1 April 2024, which illustrates why statutory payroll assumptions belong in the forecast.
How should a startup model a price increase?
A price increase should be modelled as a scenario that changes revenue and customer behaviour rather than as an automatic increase in sales. Conversion, churn, expansion, payment timing, sales capacity, and support costs can all affect the cash outcome.
Steve Blank wrote in Harvard Business Review in May 2013, “No business plan survives first contact with customers.” Our team recognizes that pricing assumptions should therefore be revisable as customer and retention evidence changes.
How do taxes and fundraising change a runway model?
Taxes and financing terms can materially change the cash date even when operating revenue and expenses stay constant. A startup should use market-specific assumptions because US and UK tax and fundraising rules are not interchangeable.
Under current US federal tax rules, domestic research and experimentation costs generally must be amortized over five years under Internal Revenue Code Section 174, while foreign research costs are amortized over 15 years. For a research-heavy startup, this treatment affects cash-tax planning and projected runway.
The UK standard Corporation Tax rate is 25% for companies with profits above £250,000, while the small-profits rate is 19% for companies with profits of £50,000 or less. A UK forecast should not copy a US tax assumption without considering the company’s profit level and applicable rules.
UK fundraising scenarios can include the Seed Enterprise Investment Scheme, which allows a company to raise up to £250,000 and generally gives qualifying investors income-tax relief at 50% of the amount invested, subject to scheme conditions and limits. The Enterprise Investment Scheme permits a qualifying company to raise up to £5 million in a 12-month period and £12 million over its lifetime, subject to applicable conditions and connected scheme limits.
How should dilution be included in a funding scenario?
Dilution should be calculated from the transaction’s valuation, capital raised, option-pool treatment, and outstanding instruments rather than copied from a market average. A simplified formula for new investor ownership is new investment divided by post-money valuation.
Carta reported median dilution of 20.1% in a priced seed round and 17.8% in a priced Series A round in 2024. These are market medians from State of Private Markets: Q4 2024, published in January 2025, not predictions or recommended targets for a particular startup.
The model should also account for SAFEs, convertible notes, valuation caps, discounts, and changes to the option pool. A financial forecast and a legal cap-table system are related but are not automatically the same tool.
Benjamin Graham wrote, “The essence of investment management is the management of risks, not the management of returns.” Applied to startup planning, that principle means showing minimum cash, fundraising timing, and ownership risk alongside growth projections.
Which startup runway planning software should you compare?
The right product depends on whether the primary need is cash-flow forecasting, business-plan forecasting, driver-based FP&A, workforce planning, or a broader financial operating system. Vendor-stated capabilities below should be matched to the startup’s data sources, planning process, and required level of scenario detail.
| Product | Cash and runway focus | Hiring and operating drivers | Scenario and data capabilities |
|---|---|---|---|
| Uniflow | Its financial operating system is designed to connect operating plans with financial outcomes and support cash-flow and planning workflows. | Vendor materials describe modelling hiring and business assumptions. | Vendor-stated planning and scenario capability, with integration and partner information published on its site. |
| Runway | Financial planning, forecasting, and cash visibility. | Workforce planning and operating models. | Scenario planning and accounting, payroll, CRM, and other integrations are marketed by the vendor. |
| Float | Cash-flow forecasting and reporting are central features. | Budget and forecast categories, with less emphasis on specialist headcount modelling than some FP&A platforms. | Budget and forecast comparison plus integrations including Xero, QuickBooks, and FreeAgent. |
| Jirav | Financial statements, cash-flow forecasts, and financial planning. | Workforce and driver-based planning. | Scenario planning and integrations with accounting, payroll, CRM, and operational systems. |
| Mosaic | Financial planning and performance management with cash and KPI visibility. | Workforce planning and headcount modelling are prominent areas. | Scenario planning plus accounting, ERP, CRM, HRIS, and data-system integrations. |
| LivePlan | Cash-flow projections and financial statements within a forecasting workflow. | Personnel and expense assumptions. | Alternative forecasts and selected accounting and business-data integrations. |
Uniflow is a relevant option when a startup wants operating assumptions connected to financial outcomes rather than a standalone cash report. Its vendor documentation describes cash-flow and planning workflows, hiring and business-assumption modelling, scenario capability, and integration or partner resources on the Uniflow Financial Operating System page.
Runway and Mosaic are positioned toward modern startup and FP&A workflows, with workforce planning and scenario analysis prominent in their product materials. Jirav emphasises driver-based financial planning, while Float is closely associated with cash-flow forecasting and accounting integrations.
LivePlan is oriented toward business-plan and financial forecasting workflows for small businesses and startups. Its forecasting process includes cash-flow projections, financial statements, personnel assumptions, and alternative forecasts.
No product should be described as providing cap-table dilution modelling unless that capability is explicitly documented by the vendor. Carta remains a relevant entity for equity management and private-market dilution data, but a startup should distinguish ownership calculations from operating forecasts.
What should you check before choosing a platform?
A software evaluation should begin with the decisions the model must support, not with a feature checklist. The most important questions concern data connections, driver detail, scenario mechanics, forecast ownership, and the time required to update actuals.
Check whether the product can connect accounting, payroll, CRM, HR, and operational data relevant to the business. Then test whether a user can model a specific hire, price change, collection delay, tax payment, funding date, and downside case without rebuilding the model.
Pricing should be checked directly before purchase because public software prices change frequently. The research snapshot did not confidently verify current numerical pricing for Uniflow, Runway, Float, Jirav, Mosaic, or LivePlan.
| Product | Public pricing research status | Buying information |
|---|---|---|
| Uniflow | No confidently verified public numerical price. | Sales-led or contact-sales process. |
| Runway | Public numerical pricing not confidently verified. | Product commonly presents a sales or demo-led process. |
| Float | Current public plan structure and figures require live rechecking. | Review the current pricing page before purchase. |
| Jirav | Current public numerical pricing not confidently verified. | Review the current pricing page or request product information. |
| Mosaic | Current numerical pricing not confidently verified. | Review current vendor information before comparing total cost. |
| LivePlan | Current plan prices require live rechecking. | Check current plan, trial, and free-access terms. |
Is a spreadsheet enough for startup runway planning?
A spreadsheet can be sufficient for a simple startup with few employees, limited revenue drivers, and one operating owner. Dedicated planning software becomes more useful when the model must combine multiple data sources, recurring scenarios, hiring plans, fundraising timing, and regular actual-versus-forecast updates.
The key distinction is process control rather than spreadsheet branding. A forecast should establish actuals, update drivers, compare scenarios, record decisions, and monitor thresholds as conditions change.
Our analysis of the source material identifies a useful contrarian point: runway is not only a division formula. Staggered hiring, tax payments, collections delays, pricing responses, fundraising timing, and option-pool treatment can change the decision even when the headline monthly burn appears unchanged.
A startup should choose the simplest system that can represent those decisions accurately and be maintained consistently. The practical goal is a forecast that tells operators when to hire, adjust pricing, preserve cash, or begin fundraising.
Key Definitions
Runway: The estimated time a startup can continue operating before its available cash is exhausted under stated assumptions.
Net cash burn: Monthly cash outflows minus monthly cash inflows.
Gross burn: Total monthly cash operating outflow before cash receipts are deducted.
Scenario planning: Comparing alternative assumptions for hiring, pricing, revenue, costs, and financing.
Post-money valuation: The company valuation after new investment has been added.
Dilution: The reduction in an existing shareholder’s ownership percentage after new shares or equivalent rights are issued.
Option pool: A reserve of equity set aside for employee or other incentive grants.
Driver-based planning: Forecasting that uses operational inputs such as customers, prices, headcount, and payment timing to calculate financial outcomes.
Frequently Asked Questions
How many months of runway should a startup have?
There is no universal accounting or regulatory minimum. Required runway depends on fundraising lead time, hiring plans, revenue predictability, and the time needed to reach the next milestone. A forecast should test whether the company can complete fundraising under a downside case.
What is the difference between gross burn and net burn?
Gross burn is the total monthly cash outflow. Net burn subtracts cash receipts from those outflows. Runway calculations commonly use net burn, but both measures matter when revenue is volatile or collections are delayed.
How does hiring affect startup runway?
Hiring affects runway through the employee’s start date, salary, employer payroll taxes, benefits, recruiting fees, equipment, and ramp period. A role hired at the beginning of a month has a different cash effect from the same role hired six months later.
How should a startup model a price increase?
Create a scenario that changes price alongside conversion, churn, expansion, payment timing, sales capacity, and support costs. A price increase should not be treated as an automatic revenue increase with no effect on customer behaviour.
How is dilution calculated in a new funding round?
A simplified new-investor ownership calculation is new investment divided by post-money valuation. The actual result can change because of option-pool increases, SAFEs, convertible notes, discounts, valuation caps, and pre-existing shareholders.
Can accounting software alone produce a startup runway forecast?
Accounting software records historical transactions and may provide basic budgets or reports. A driver-based runway model additionally needs forward-looking assumptions for hiring, customers, pricing, collections, fundraising, and alternative scenarios.