Fixed vs. Variable Costs: What’s the Difference?

What are fixed costs?

Fixed costs stay the same regardless of how much work you do or how much revenue you generate. You pay them every month whether you have zero clients or twenty.

For a freelancer or small business, fixed costs typically include:

• Rent or coworking membership — same payment every month
• Software subscriptions — design tools, project management, accounting software
• Insurance premiums — liability, professional indemnity, health
• Loan or lease payments — equipment financing, vehicle lease
• Salaried employees — their pay doesn’t change with project volume
• Internet and phone plans — base monthly charges

Fixed costs are predictable, which makes them easier to budget for. But they also create a floor — a minimum amount you must earn each month just to break even.

What are variable costs?

Variable costs rise and fall in direct proportion to your business activity. More projects means higher variable costs; fewer projects means lower ones.

Common variable costs:

• Materials and supplies — printing, hardware, project-specific purchases
• Subcontractor fees — you only pay them when you have work to delegate
• Transaction and payment processing fees — Stripe, PayPal, credit card fees
• Shipping and delivery — tied directly to orders or deliverables
• Sales commissions — percentage of revenue paid to referral partners
• Travel expenses — project-related trips, client visits

Variable costs are harder to predict, but they have an upside: when business slows down, these costs drop automatically.

Fixed vs. variable costs — side-by-side

Criteria	Fixed Costs	Variable Costs
Changes with volume?	No — stays constant	Yes — rises and falls with activity
Predictability	High — easy to budget	Low — depends on project load
Risk when revenue drops	High — you still pay in full	Low — costs decrease automatically
Examples	Rent, insurance, salaries, subscriptions	Materials, subcontractors, shipping, commissions
Control	Harder to cut quickly	Easier to scale up or down
Impact on break-even	Raises the break-even point	Affects margin per project

Why this distinction matters for pricing

When you build a project quote, variable costs are straightforward — you add them as line items. But fixed costs are invisible if you don’t actively account for them.

If your monthly fixed costs are $4,000 and you complete 8 projects per month, each project needs to carry at least $500 in overhead allocation just to cover the basics — before you earn a single dollar of profit.

This is why understanding your overhead rate matters. It tells you exactly how much of each dollar goes to keeping the lights on.

Ignore fixed costs in your pricing and every project feels profitable but your bank account tells a different story.

Semi-variable costs

Some costs don’t fit neatly into either category. They have a fixed base with a variable component on top.

• Phone plan — flat monthly fee + overage charges
• Cloud hosting — base tier fee + usage-based scaling
• Utilities — minimum connection charge + consumption
• Employee overtime — base salary is fixed, overtime is variable

For pricing purposes, split semi-variable costs: treat the fixed portion as overhead and the variable portion as a project cost. This gives you the most accurate picture of what each project truly costs.