Cash Flow Management and Working Capital: Controlling SaaS Cash Position
Master cash flow management. Optimise working capital, extend runway, manage cash conversion.
Key Takeaways
- Cash runway: Cash on hand ÷ monthly burn rate = months of runway. Example: £2M cash, £200K monthly burn = 10 months runway. Target: 12-18 months runway minimum. Below 6 months = urgent (start fundraising immediately). Burn rate = total monthly expenses - total monthly revenue. Net burn (including revenue) is the real metric. Track weekly during tight cash periods.
- Cash conversion cycle: Time from spending cash to receiving cash. For SaaS: (Days to build feature) + (Days to close sale) + (Days to collect payment). Example: 30 days build + 45 days sales cycle + 30 days collection = 105 days. Optimise: Annual prepayment (collect 12 months upfront), reduce collection days (auto-billing), shorten sales cycle. Best SaaS companies have negative cash conversion (collect before delivering).
- Working capital management: Current assets - current liabilities. Key levers: (1) Collect receivables faster (net-30 not net-60), (2) Negotiate longer payment terms with suppliers (net-60 not net-30), (3) Incentivise annual prepayment (10-20% discount). Example: Move 50% of customers to annual prepay at 15% discount. Cash impact: £500K ARR × 50% × 85% = £212.5K upfront (vs £20.8K/month). Working capital improvement: £191.7K.
Managing Cash Flow and Working Capital in SaaS
Ensuring your SaaS company never runs out of cash. **Cash runway fundamentals** Calculating runway: Gross burn rate: - Total monthly expenses (before revenue) - Includes: Salaries, rent, cloud costs, marketing, tools - Example: £250K monthly expenses Net burn rate: - Monthly expenses minus monthly revenue - Example: £250K expenses - £100K revenue = £150K net burn Runway: - Cash on hand ÷ net burn rate - Example: £1.8M cash ÷ £150K net burn = 12 months Runway milestones: | Runway | Status | Action | |---|---|---| | 18+ months | Comfortable | Focus on growth | | 12-18 months | Healthy | Plan next fundraise | | 6-12 months | Caution | Start fundraising now | | 3-6 months | Urgent | Emergency measures | | <3 months | Critical | Bridge or wind down | Cash tracking cadence: - Monthly: Review P&L, cash balance, runway - Weekly: Track cash balance (during tight periods) - Daily: Monitor during critical runway (below 3 months) Weekly cash report template: | Week | Opening balance | Revenue received | Expenses paid | Closing balance | Runway (months) | |---|---|---|---|---|---| | Week 1 | £1,800,000 | £25,000 | £62,500 | £1,762,500 | 11.75 | | Week 2 | £1,762,500 | £25,000 | £62,500 | £1,725,000 | 11.50 | **Cash conversion cycle for SaaS** Understanding cash flow timing: Traditional SaaS cash flow: Monthly subscription model: - Customer signs: Day 0 - First payment: Day 30 (net-30 invoice) - Revenue recognised: Month 1 - Cash received: Day 30-60 Annual prepayment model: - Customer signs: Day 0 - Payment: Day 0-30 (upfront) - Revenue recognised: Spread over 12 months - Cash received: Day 0-30 (all upfront!) Cash flow comparison: Monthly billing (£10K/month customer): - Month 1: £10K - Month 6: £60K cumulative - Month 12: £120K cumulative Annual prepayment (£100K/year, 17% discount): - Month 1: £100K (all received) - Month 6: £100K (same) - Month 12: £100K (until renewal) Cash flow advantage: £100K upfront vs £10K/month = £90K better cash position in month 1 **Optimising accounts receivable** Reducing days sales outstanding (DSO): Current state (example): - Total monthly revenue: £200K - Accounts receivable: £400K - DSO: (£400K / £200K) × 30 = 60 days Improvement strategies: Strategy 1: Auto-billing (credit card/direct debit) - Set up automatic collection - No invoicing delay - DSO: 0-3 days - Impact: Eliminates collection risk Strategy 2: Shorter payment terms - Move from net-60 to net-30 - For enterprise: net-30 with 2% early payment discount (2/10 net 30) - Impact: Reduce DSO by 30 days Strategy 3: Upfront billing - Bill at start of period (not end) - Annual customers: Bill full year upfront - Impact: Negative DSO (collect before service) Strategy 4: Dunning automation - Automated payment retry (failed cards) - Email sequence: Day 1, Day 3, Day 7, Day 14 - Final: Account suspension at Day 21 - Impact: Reduce involuntary churn and accelerate collection **Managing accounts payable** Extending payment terms: Key supplier categories: Cloud infrastructure (AWS/Azure/GCP): - Standard: Monthly billing (net-30) - Negotiate: Reserved instances (1-3 year commit for 30-60% discount) - Cash impact: Higher upfront, lower monthly - Best for: Predictable workloads SaaS tools: - Standard: Monthly billing - Negotiate: Annual billing (often 10-20% discount) - Cash impact: Larger upfront payment, lower total cost Contractors/freelancers: - Standard: Net-14 to net-30 - Negotiate: Net-45 to net-60 - Cash impact: Delays cash outflow by 2-4 weeks Office/facilities: - Standard: Monthly rent - Negotiate: Quarterly payment, rent-free period - Cash impact: Delays outflow, rent-free improves runway **Annual prepayment strategy** Incentivising annual contracts: Pricing structure: Monthly plan: £100/month (£1,200/year) Annual plan: £80/month equivalent (£960/year) Discount: 20% for annual commitment ROI of annual prepayment: Revenue impact: - Monthly: £1,200/year (collected over 12 months) - Annual: £960/year (collected upfront) - Revenue difference: -£240/year (discount cost) Cash flow impact: - Monthly: Collect £100/month = £600 by month 6 - Annual: Collect £960 in month 1 - Cash advantage: £360 better at month 6 Churn impact: - Monthly churn: 5%/month → ~46% annual churn - Annual churn: Much lower (committed for year) - Retention value: Significant Overall ROI: - Discount cost: £240/year - Cash flow benefit: Better working capital - Retention benefit: Lower churn - Net: Strongly positive for most SaaS companies **Managing negative cash flow periods** Bridge strategies: Revenue-based financing: - Borrow against future recurring revenue - Example: £500K loan at 1.5x repayment (pay back £750K from revenue) - Cost: 50% premium - When: Short-term bridge, don't want dilution Venture debt: - Debt from specialist lenders (e.g., Silicon Valley Bank) - Typically 25-30% of last equity round - Example: Raised £5M Series A, get £1.5M venture debt - Cost: 8-12% interest + warrants (0.5-1% dilution) - When: Extend runway between equity rounds Customer prepayments: - Offer discounts for multi-year prepayment - Example: 3-year deal at 30% discount (collect 2.1 years revenue upfront) - Cost: Discount - When: Enterprise customers, need cash urgently Expense reduction: - Cut non-essential spending - Renegotiate contracts - Delay hiring - Example: Cut £50K/month expenses = extend runway by 3 months on £150K burn **Cash flow forecasting** 13-week cash flow forecast: | Week | Cash in | Cash out | Net | Balance | |---|---|---|---|---| | Week 1 | £50K | £60K | -£10K | £1,790K | | Week 2 | £45K | £55K | -£10K | £1,780K | | ... | ... | ... | ... | ... | | Week 13 | £55K | £58K | -£3K | £1,660K | Key inputs: - Known revenue collections (contracted, invoiced) - Known expenses (salaries, rent, subscriptions) - Variable costs (cloud, marketing spend) - One-off items (equipment, legal fees) Scenario planning: Base case: - Revenue grows 5% monthly - Expenses grow 3% monthly - Runway: 12 months Upside case: - Revenue grows 8% monthly - Expenses grow 2% monthly - Runway: 18 months Downside case: - Revenue flat - Expenses grow 3% monthly - Runway: 8 months Use downside for planning, base case for targets **Treasury management** Where to hold cash: Operating account: - 1-3 months of expenses - Instant access - Used for: Daily operations Deposit account: - 3-6 months of expenses - Notice period (32-95 days) - Higher interest rate - Used for: Near-term reserves Money market / treasury bills: - 6+ months of expenses (excess cash) - Low risk, moderate return - Used for: Longer-term reserves Rule: Never put operating cash at risk Interest income: Example with £3M cash: - Operating (£500K): 0.5% = £2.5K/year - Deposit (£1M): 4% = £40K/year - Money market (£1.5M): 4.5% = £67.5K/year - Total interest: £110K/year Not trivial — treasury management pays for itself