When cash gets tight, most business leaders start asking the same questions:
When are our customers going to pay us? How much payroll do we have coming up? What bills absolutely need to be paid?
And most critically …
How long can we operate before cash becomes a problem?
When faced with a cash flow crunch, many organizations turn to a 13-week cash flow model. Unlike annual budgets or long-range forecasts, a 13-week cash flow model focuses on one thing: understanding whether you have enough cash to meet your obligations over the next three months.
At Bay Business Group, we often help small businesses, nonprofits, and government contractors build 13-week cash flow models when leadership needs immediate visibility into their financial position.
What Is a Cash Flow Forecast?
A cash flow forecast is a financial planning tool that projects expected cash inflows and outflows over a period of time. They can be short-term forecasts, such as a 13-week forecast, or they can be longer, such as a rolling, 12-month forecast.
The purpose is not to predict profitability. It’s to predict liquidity. (Click here to read more about The Difference Between Profit and Cash Flow.)
In other words, a cash flow forecast answers: “Will we have enough cash to operate?” Because the forecast is updated weekly, it provides leadership with a constantly evolving view of future cash needs.
Step 1: Start With Current Cash
Every cash flow model begins with your current cash balance, including:
- Bank accounts
- Operating accounts
- Savings accounts available for operations
Think of this as your starting point. Everything else in the forecast will increase or decrease that balance.
Step 2: Forecast Customer Payments
Next, estimate incoming cash. Start with your Accounts Receivable aging report. Consider:
- Which invoices are currently outstanding?
- When do we realistically expect payment?
- Are there customers who routinely pay late?
Then consider future invoices you expect to issue during the next 13 weeks. For example, if you know a contract milestone will be invoiced next month, include that expected payment in your forecast.
Remember, the goal is not perfection. The goal is creating a reasonable estimate of future cash collections.
Step 3: Forecast Payroll
For most organizations, payroll is the largest cash outflow. Your cash flow model should include:
- Current employee headcount
- Payroll frequency
- Planned hiring
- Expected bonuses or commissions
If you expect staffing changes during the forecast period, those changes should be incorporated as well.
For government contractors, this may include new hires tied to upcoming contracts.
For nonprofits, it may include grant-funded positions.
Step 4: Identify Vendor Payments
Next, review outstanding bills and future obligations. You’ll want to consider:
- Accounts payable
- Software subscriptions
- Contractors
- Insurance payments
- Professional services
Ask yourself: Which payments are fixed? Which payments can be delayed if necessary?
This visibility helps leadership prioritize spending if cash becomes constrained.
Step 5: Include Debt and Other Fixed Obligations
Many organizations overlook recurring obligations, such as:
- Loan payments
- Mortgage payments
- Rent
- Equipment leases
- Tax payments
Because these expenses are generally unavoidable, they should be included early in the forecasting process.
Step 6: Account for Credit Cards and Other Variable Expenses
Most organizations have expenses that fluctuate month to month, such as:
- Credit card bills
- Travel costs
- Marketing expenses
- Office supplies
While estimates won’t be perfect, including reasonable assumptions helps create a more realistic forecast.
What Happens If the Cash Flow Forecast Shows a Cash Shortfall?
This is where a 13-week cash flow forecast becomes especially valuable. Suppose the forecast shows cash becoming critically low in week seven. Your organization’s leadership now has time to act.
Potential solutions to cash shortfalls may include:
Accelerating Customer Collections
- Follow up on overdue invoices
- Offer early payment incentives
- Improve billing processes
Reducing Expenses
- Delay discretionary spending
- Pause nonessential projects
- Renegotiate vendor terms
Adjusting Operations
- Reevaluate hiring plans
- Reduce overtime
- Postpone major purchases
Securing Additional Funding
Sometimes additional capital is necessary. Potential funding sources may include:
- Business lines of credit
- Investor funding
- Partner contributions
The key advantage is that the forecast provides visibility before a crisis occurs.
How Bay Business Group Helps With Cash Flow Modeling
Building and maintaining a 13-week cash flow model takes time. At Bay Business Group, we often create forecasting models that integrate directly with clients’ accounting systems, allowing forecasts to update more efficiently as financial data changes. This creates a living forecast that evolves as conditions change.
Our outsourced accounting and fractional CFO services help organizations:
- Build customized forecasting models
- Monitor weekly cash positions
- Evaluate funding needs
- Model multiple financial scenarios
- Develop proactive solutions before cash becomes a problem
Turn Cash Visibility Into Better Decisions
A 13-week cash flow forecast doesn’t eliminate financial challenges, but it does eliminate surprises. After all, when you know what’s coming, you have time to respond.
If your organization is facing cash flow uncertainty, Bay Business Group can help build a forecasting process that provides clarity and confidence.
Click here to schedule a free 30-minute consultation to learn how we can help you take control of your cash flow or email us directly:
Michael Young, CPA | [email protected]
Matthew Young, CPA | [email protected]