Payroll is one of the most important expenses a business needs to plan for, yet forecasting it accurately can be more complicated than multiplying the number of employees by their annual salaries.
Employees may start or leave at different times throughout the year. Some earn salaries, while others are paid hourly. Compensation may increase through raises, and benefits add costs beyond base pay.
As a business grows, these differences can materially affect its future expenses.
A company planning to hire five additional employees may understand their individual salaries but still underestimate how much those hires will affect profitability and cash flow.
That is why payroll forecasting should be part of a broader financial planning process rather than an isolated spreadsheet calculation.
By connecting workforce plans to financial forecasts, businesses can evaluate future employee costs, understand when those expenses will occur, and determine how staffing decisions may affect their financial position.
This guide explains how to forecast payroll expenses, which costs to include, and how integrated workforce planning software can make the process easier.
What Is Payroll Forecasting?
Payroll forecasting is the process of estimating future employee compensation expenses based on current staffing, planned hiring, wages, salaries, benefits, compensation increases, and employment dates.
A payroll forecast helps businesses estimate how much they expect to spend on their workforce during future months or years.
Unlike a payroll report, which shows what employees have already been paid, a payroll forecast estimates future compensation costs.
For example, a business may want to know:
- How much will payroll increase over the next 12 months?
- What will five new employees cost if they start at different times?
- How will annual salary increases affect future expenses?
- How much should be budgeted for employee benefits?
- How will additional payroll expenses affect profitability?
- Can projected cash flow support the hiring plan?
Answering these questions requires more than reviewing historical payroll totals.
It requires modeling the workforce the business expects to have in the future.
Why Is Payroll Forecasting Important?
Payroll expenses can be relatively predictable for an established workforce, but they change as employees are hired, leave, receive raises, or move between positions.
Without a structured forecast, businesses may underestimate future compensation commitments.
This can lead to budgets that do not reflect planned staffing changes or financial forecasts that fail to incorporate future payroll expenses.
Payroll Forecasting Supports Better Hiring Decisions
A business considering a new employee needs to understand the total financial commitment.
A $100,000 salary does not necessarily mean the employee will cost the business exactly $100,000 per year.
Benefits, employer payroll taxes, and other compensation-related expenses may increase the total cost.
The employee's start date also affects the amount incurred during the first year.
Payroll Forecasting Improves Financial Planning
When projected payroll expenses are incorporated into financial forecasts, management can evaluate their impact on operating expenses, profitability, and cash flow.
This helps connect staffing decisions to broader financial goals.
Payroll Forecasting Supports Scenario Analysis
Businesses can evaluate alternative staffing plans before making commitments.
For example, management might compare hiring three employees in January with hiring those same employees in July.
The difference in first-year payroll expenses may be substantial.
A forecast makes that difference easier to quantify.
What Costs Should Be Included in a Payroll Forecast?
A complete payroll forecast should account for the compensation-related costs relevant to the business.
The specific components depend on the company's employment arrangements, benefits policies, and accounting practices.
1. Base Salaries
For salaried employees, the forecast begins with their annual compensation.
A simple monthly salary estimate is:
Monthly Salary Expense = Annual Salary ÷ 12
For example, an employee earning $96,000 annually has a base monthly salary expense of approximately $8,000.
However, this calculation assumes the employee is employed for the full month and does not include benefits or other employer costs.
2. Hourly Wages
Hourly employees require assumptions about their expected working hours.
A basic calculation is:
Forecasted Wages = Hourly Rate × Expected Hours Worked
For example, an employee earning $25 per hour and working 160 hours during a month would generate $4,000 in base wages.
Actual payroll may differ because of overtime, paid leave, variable schedules, or other factors.
3. Employee Benefits
Benefits may include employer-paid health insurance, retirement contributions, and other compensation-related programs.
Some businesses estimate benefits as a percentage of base compensation.
For example, a business might use a 20% benefits assumption for planning purposes.
An employee with a $100,000 annual salary would then have an estimated annual salary-plus-benefits cost of $120,000.
The appropriate benefits assumption should reflect the company's actual benefit arrangements.
4. Employer Payroll Taxes
Employer payroll taxes may include Social Security, Medicare, unemployment taxes, and other applicable employment taxes.
These costs vary by jurisdiction, employee compensation, and applicable tax rules.
They should be considered when estimating the full employer cost of compensation.
If a workforce planning tool does not calculate every applicable tax automatically, the business should account for those amounts separately in its broader financial forecast.
5. Bonuses and Variable Compensation
Some employees receive bonuses, commissions, or other variable compensation.
These expenses may depend on sales performance, company profitability, individual goals, or other factors.
A payroll forecast should incorporate material variable compensation obligations where applicable.
6. Planned Salary Increases
Compensation often changes over time.
Annual raises, promotions, and market adjustments can increase future payroll expenses.
A forecast should account for when those increases occur rather than assuming compensation remains unchanged indefinitely.
7. New Hires and Employee Departures
Employee start and end dates determine when compensation expenses begin and stop.
A business planning to hire an employee in October should not include a full year of that employee's salary in its current-year payroll forecast.
Similarly, planned departures may reduce future compensation expenses.
How to Forecast Payroll Expenses Step by Step
Payroll forecasting becomes easier when employee assumptions are organized consistently.
The following process can be used for a small business, growing company, or financial advisory engagement.
Step 1: Establish the Current Workforce
Begin by identifying the employees and positions that form the starting workforce.
For each employee or position, record relevant planning information, such as employment type, compensation, expected hours, benefits assumptions, and planned employment dates.
This establishes the baseline for future payroll expenses.
Step 2: Calculate Base Compensation
Calculate the expected salary or hourly wages for each employee over the forecast period.
For salaried employees, the forecast generally reflects the applicable salary during each period of employment.
For hourly employees, the forecast depends on the hourly rate and expected working hours.
Businesses should use assumptions that reflect their actual compensation arrangements.
Step 3: Add Benefits and Other Employer Costs
Incorporate the employer-paid benefits and compensation-related costs that apply to each position.
This provides a more complete estimate of employee costs than base wages alone.
Where costs are not included directly in the workforce planner, they should be accounted for separately to avoid understating total expenses.
Step 4: Incorporate Hiring and Departure Dates
Adjust compensation forecasts based on when employees are expected to begin or end employment.
This is especially important for businesses planning significant workforce changes.
Step 5: Apply Planned Compensation Increases
Include salary raises or other compensation changes in the appropriate future periods.
A raise occurring in July should affect the forecast beginning in July rather than being applied retroactively to earlier months.
Step 6: Assign Payroll Costs to Expense Categories
Determine where the forecasted employee costs belong in the company's financial statements.
Some labor costs may be included in cost of goods sold, while others are classified as operating expenses.
The classification should reflect the nature of the work and the company's accounting policies.
Step 7: Incorporate Payroll Into the Financial Forecast
Transfer the planned workforce costs into the corresponding forecasted expense categories.
This allows the financial forecast to reflect expected payroll spending and its impact on profitability and cash flow.
Step 8: Evaluate Alternative Staffing Plans
Finally, test how different hiring schedules, compensation increases, or workforce changes affect the financial outlook.
This turns payroll forecasting into a decision-making tool rather than simply an expense estimate.
Example: Forecasting Payroll Costs for a Growing Business
Consider a hypothetical company with five employees and plans to hire three additional employees during the year.
The company wants to estimate its total annual payroll expenses, including benefits.
For simplicity, the example uses a 20% benefits assumption and excludes employer payroll taxes, bonuses, and other costs.
The table illustrates why payroll forecasting should account for individual start dates.
An employee hired in July generates approximately six months of compensation expense during that calendar year, assuming employment begins on July 1.
An employee hired in October generates approximately three months.
These differences affect the first-year expense forecast.
Why Does the Annualized Cost Differ From the First-Year Cost?
The annualized workforce cost represents the expected cost of employing everyone for a full year at their stated compensation levels.
The first-year cost reflects the actual months each employee is expected to work during the forecast period.
For a growing business, these figures can differ substantially.
A company may be able to afford a hiring plan during the current year but face a significantly larger payroll commitment in the following year.
That is why businesses should evaluate workforce costs across multiple forecast periods rather than focusing only on the initial hiring year.
How Do Salary Increases Affect Payroll Forecasts?
Salary increases can have a compounding effect on future payroll expenses.
Consider an employee earning $100,000 annually.
If the employee receives a 5% raise, their new annual salary becomes $105,000.
If another 5% raise occurs the following year, the salary increases to $110,250.
The second raise is calculated on the increased salary, not the original amount.
Across a larger workforce, these increases can materially affect future expenses.
For example, a company with 30 employees may experience significant payroll growth even if it does not hire anyone new.
This is why payroll forecasting should account for both changes in headcount and changes in compensation.
RunSmart's Workforce Planner allows businesses to model planned pay increases and their timing as part of future workforce expenses.
How Should Payroll Expenses Be Allocated Between COGS and Operating Expenses?
Payroll forecasting becomes more useful when compensation costs are assigned to the appropriate financial statement categories.
Not all employee expenses belong in the same place.
Direct Labor and Cost of Goods Sold
Employees directly involved in producing goods or delivering services may have compensation costs classified within cost of goods sold, depending on the company's accounting policies.
For example, a services company may classify certain delivery personnel costs as direct labor.
These costs affect gross profit and gross margin.
Indirect Labor and Operating Expenses
Employees supporting sales, marketing, administration, and other operating functions may have compensation costs classified as operating expenses.
These costs affect operating income and operating margin.
Employees With Split Responsibilities
Some employees perform work across multiple functions.
For example, an operations manager may spend part of their time supporting service delivery and part handling administrative responsibilities.
In those cases, businesses may need to allocate compensation across multiple expense categories.
RunSmart's Workforce Planner allows users to assign employee costs to forecastable profit and loss expense categories, including COGS and operating expenses.
It also supports splitting compensation costs across multiple categories.
This helps ensure that planned workforce expenses are reflected in the appropriate parts of the financial forecast.
How Does Payroll Forecasting Affect Profitability?
Payroll expenses directly influence a company's financial results.
When forecasted payroll costs increase, profitability may decline unless the company generates additional revenue, reduces other expenses, or achieves offsetting efficiencies.
Consider a company with projected annual revenue of $3 million and projected operating income of $450,000 before a new hiring plan.
Suppose the hiring plan adds $180,000 in annual operating expenses.
If all other assumptions remain unchanged, projected operating income would decline to $270,000.
The operating margin would decrease from 15% to 9%.
This does not necessarily mean the hiring plan is a poor decision.
The new employees may help the company improve service delivery, increase sales capacity, or support future growth.
However, those potential benefits should be evaluated separately rather than assumed automatically.
An integrated financial forecast makes the expense impact visible so management can evaluate whether the expected benefits justify the financial commitment.
How Does Payroll Forecasting Affect Cash Flow?
Payroll expenses also create cash obligations.
Businesses must pay employees according to their payroll schedules, regardless of whether revenue collections occur at the same time.
This makes payroll forecasting particularly important for cash flow planning.
A company may generate sufficient accounting revenue to support its workforce while experiencing temporary cash shortages because customer payments arrive later than expected.
Similarly, a business may hire additional employees in anticipation of future revenue that has not yet materialized.
By incorporating planned workforce costs into financial forecasts, businesses can evaluate how payroll spending affects future cash flow.
However, the timing of cash payments may differ from when compensation expenses are recognized.
For precise short-term cash planning, businesses should also account for payroll payment dates, accrued compensation, and applicable payroll liabilities.
Example: Hiring Earlier vs. Hiring Later
Suppose a company plans to hire two employees with combined annual salary and benefits costs of $240,000.
If both begin in January, their combined first-year cost is approximately $240,000.
If both begin in July, their combined first-year cost is approximately $120,000.
Delaying the hires reduces the first-year compensation commitment by approximately $120,000.
That difference may improve near-term profitability and cash availability, depending on payment timing and other financial assumptions.
The business must still consider whether delaying those employees would affect operations or revenue opportunities.
How Can Businesses Use Payroll Forecasting for Scenario Planning?
Payroll forecasting is particularly valuable when businesses need to compare alternative staffing decisions.
Rather than relying on one fixed hiring plan, management can evaluate several possible approaches.
Scenario 1: Accelerated Hiring
The company hires additional employees earlier than planned.
This increases compensation expenses sooner and may create additional near-term cash requirements.
Scenario 2: Delayed Hiring
The company postpones selected positions.
This reduces near-term payroll expenses but may also affect the company's ability to execute operational plans.
Scenario 3: Higher Salary Increases
The company models larger raises to understand how compensation changes affect future expenses and margins.
Scenario 4: Hiring Freeze
The company stops adding employees while maintaining its existing workforce.
This can help management evaluate whether current staffing costs remain sustainable under slower revenue growth.
Scenario 5: Workforce Reduction
The company models planned departures or staffing reductions.
This can reduce forecasted payroll expenses, although actual savings may be affected by severance, contractual obligations, and other costs.
RunSmart allows businesses to incorporate planned workforce costs into their financial forecasts and evaluate how alternative assumptions affect projected financial performance.
The objective is to understand the financial consequences of each staffing strategy before making decisions.
Payroll Forecasting in Spreadsheets vs. Integrated Workforce Planning Software
Many businesses begin forecasting payroll in Excel or Google Sheets.
This can work for smaller teams with relatively simple compensation arrangements.
However, the process becomes more complicated as employee counts, compensation structures, and hiring schedules change.
For example, a spreadsheet model may require separate calculations for salaries, hourly wages, benefits, raises, hiring dates, and cost allocations.
Those calculations may then need to be transferred into another spreadsheet containing the company's financial forecast.
Integrated workforce planning software reduces the need to manually maintain these connections.
Instead of calculating employee costs separately and rebuilding financial models, businesses can manage workforce assumptions and incorporate the resulting costs into their broader financial forecasts.
How RunSmart Automates Payroll Expense Forecasting
RunSmart's Workforce Planner helps businesses model future employee expenses and connect those costs to financial forecasts.
Businesses can plan salaried and hourly employees, full-time and part-time positions, compensation, benefits, pay increases, and employment dates.
The Workforce Planner calculates planned compensation costs based on those assumptions.
Users can then assign the costs to forecastable expense categories from their profit and loss statements.
Where necessary, costs can be split across multiple categories.
The planned workforce costs can be transferred into RunSmart's forecasted financial statements, allowing businesses to evaluate how staffing decisions affect profitability and cash flow.
Because RunSmart also automatically analyzes QuickBooks financial data and generates financial forecasts, payroll planning becomes part of a broader financial intelligence workflow.
Business owners, accountants, and financial advisors can examine the impact of hiring and compensation decisions without manually rebuilding their financial models.
For a broader explanation of integrated workforce planning, see Workforce Planning Software: How to Connect Hiring Decisions to Financial Forecasts.
Frequently Asked Questions
What is payroll forecasting?
Payroll forecasting estimates future employee compensation expenses based on salaries, hourly wages, benefits, hiring plans, compensation increases, and employment dates. It helps businesses understand how workforce costs may change over time.
How do you calculate forecasted payroll expenses?
Forecasted payroll expenses are calculated by estimating compensation for each employee during the periods they are expected to work, then adding applicable benefits and other employer costs. The calculations should reflect employee start dates, departures, and planned compensation changes.
Should payroll forecasts include employee benefits?
Yes. Employer-paid benefits can represent a meaningful portion of employee costs. A payroll forecast that includes only base salaries or wages may underestimate the total financial commitment.
How do you forecast payroll for new hires?
Estimate each employee's compensation, benefits, and other applicable costs, then apply those amounts beginning with the expected start date. This provides a more accurate first-year forecast than assuming every new employee works the entire year.
How do annual raises affect payroll forecasts?
Annual raises increase future compensation expenses. When raises occur in successive years, their effects can compound because each increase is generally applied to the employee's updated salary.
What is the difference between payroll forecasting and workforce planning?
Payroll forecasting focuses on estimating future compensation expenses. Workforce planning is broader and may include staffing levels, hiring schedules, organizational structure, employee allocation, and the financial impact of workforce decisions.
Can payroll forecasting software connect to financial statements?
Yes. Integrated workforce planning software can assign forecasted employee costs to financial statement expense categories and incorporate those costs into financial forecasts.
Can payroll forecasting help businesses decide when to hire?
Yes. Businesses can compare alternative hiring dates and evaluate how those decisions affect future expenses, profitability, and cash flow. The forecast supports decision-making but does not determine the operational need for a position.
Does RunSmart process employee payroll?
No. RunSmart's Workforce Planner is designed for forecasting employee costs and incorporating them into financial planning. It does not replace payroll processing or core HR administration software.
Payroll Forecasting Should Inform Financial Decisions
Payroll forecasting is more than estimating next year's salaries.
It requires understanding how compensation, benefits, raises, hiring schedules, and employee departures affect future expenses.
When payroll forecasts are disconnected from financial planning, businesses may underestimate the impact of staffing decisions on profitability and cash flow.
Integrated workforce planning makes those connections easier to evaluate.
With RunSmart, businesses can model employee compensation, allocate planned costs to financial statement categories, and incorporate workforce expenses into their financial forecasts.
This helps business owners and financial advisors evaluate hiring and compensation decisions within the context of the company's broader financial outlook.
The goal is not simply to predict payroll expenses. It is to understand how those expenses affect the business's financial future.
