What Are Overhead Costs? Meaning, Formulas and Worked Examples

Overhead costs are the ongoing expenses a business pays to stay open, such as rent, insurance, utilities and admin salaries, that cannot be traced to a specific product or service. Total overhead is the sum of those indirect costs for a period, and the overhead rate divides that total by an allocation base.

What is overhead cost in one line? Here is the quickest test you will ever need: if you would still pay it in a month with zero sales, it is overhead.

The landlord does not care that sales were slow. Neither does your insurer. That is exactly why overhead is the cost that quietly decides whether a business makes money, and why it pays to know your number to the dollar.

What Are Overhead Costs?

Overhead costs, also called overhead expenses, overheads in cost accounting, or indirect costs, are the costs of running the business as a whole rather than making one product or serving one client. They support every sale without belonging to any single one.

A bakery makes the point clearly. Flour, butter and the baker’s wages for each batch are direct costs, because you can trace them to the bread. The shop rent, the card machine fees, the accountant and the insurance policy are overhead, because the bakery pays them whether it sells 50 loaves or 500.

So what is overhead cost in cost accounting? It is everything except direct materials, direct labor and direct expenses. That definition matters, because it is how accountants decide what goes into product cost and what goes straight to the income statement.

Overhead vs Direct Costs vs Operating Expenses

These three terms overlap, which is where most confusion starts.

The short version: overhead is the indirect part of your costs. Operating expenses is the line on your profit and loss statement where most of that overhead lands. Manufacturers are the exception, because factory overhead is pulled into inventory and only hits the income statement as cost of goods sold when the goods sell.

Types of Overhead Costs

There are two useful ways to sort the types of overhead. By how it behaves, which tells you how it will move when activity changes. And by which function it supports, which tells you who owns it.

Fixed Overhead

Fixed overhead stays the same every period regardless of activity. Office rent, insurance premiums, salaried admin staff, annual software contracts and depreciation on office equipment all fall here.

“Fixed” usually means committed. A 12 month lease or an annual software plan locks the cost in until renewal, so the renewal date is your real chance to change the number.

Variable Overhead

Variable overhead rises and falls with activity. Shipping supplies, payment processing fees, sales commissions, usage based software and some maintenance costs behave this way.

Variable overhead tends to arrive as many small charges, so it is the type most likely to grow unnoticed.

Semi Variable Overhead

Semi variable overhead has a fixed base plus a usage charge. Electricity is the classic example: a fixed connection fee every month, plus a charge for what you actually use. Phone plans, per seat software and maintenance contracts with call out fees work the same way.

Administrative, Selling and Manufacturing Overhead

The second view sorts overhead by function:

• Administrative overhead supports the whole company: finance, HR, legal, office costs and general software.
• Selling overhead supports sales and marketing: brand advertising, sales team salaries and travel.
• Manufacturing overhead supports production without being part of the product: factory rent, supervisors, equipment depreciation, indirect materials and factory utilities.

For a service or software business, nearly all overhead is administrative or selling. Manufacturing overhead only matters if you make physical goods.

Overhead Cost Examples

The table below covers the overhead cost examples most small businesses carry, with their usual type and function.

What is not overhead? Raw materials, the wages of the people who make the product or deliver the service, and costs billed to one specific client job. Those are direct costs. Owner pay depends on the role: if you spend your day delivering client work, much of your pay is direct labor. If you spend it managing, it is overhead.

Overhead Cost Formulas

Every overhead cost formula starts from the same number, total overhead. The rest are ratios that put that number in context. To keep things simple, every formula below uses the same small manufacturer:

• Monthly overhead: rent $3,000, utilities $500, admin salaries $4,000, office supplies $200, equipment maintenance $300, insurance $600
• Direct labor cost: $20,000 per month
• Direct labor hours: 1,000 per month
• Units produced: 2,000 per month
• Sales: $50,000 per month

In manufacturing and in cost accounting, the overhead cost formula is usually written as indirect materials + indirect labor + indirect expenses. It is the same idea, grouped by cost element instead of by bill.

Overhead Absorption Rate Methods

The overhead absorption rate is how a manufacturer spreads overhead across products, and choosing the right overhead absorption rate method matters as much as the math. The right base is whichever activity actually drives the overhead.

How to Calculate Overhead Costs, Step by Step

Here is how to calculate overhead cost for your own business, using the same example.

Step 1: List Every Indirect Expense for the Period

Pull one month of bills, card statements and payroll. Mark each line as direct or overhead using the zero sales test. Convert annual costs to monthly: a $7,200 annual insurance policy counts as $600 a month.

Step 2: Add Them Up

Rent $3,000 + utilities $500 + admin salaries $4,000 + office supplies $200 + equipment maintenance $300 + insurance $600 = $8,600 total monthly overhead.

Step 3: Choose an Allocation Base

Pick what your overhead really follows. A workshop might use labor hours. A shop might use sales. A factory with heavy machines might use machine hours.

Step 4: Calculate the Rate and Put It to Work

With direct labor cost as the base, the overhead rate is 43%. Every $1 of direct labor carries another $0.43 of overhead. If a job needs $1,000 of direct labor, it also needs to cover $430 of overhead before it makes a cent of profit.

You can download the free overhead calculation Excel worksheet to run these steps on your own numbers.

What Is a Good Overhead Percentage?

There is no single right answer, because overhead depends on your industry and model. Still, two published benchmarks give useful reference points:

• EFS Consulting puts overhead at around 12% to 15% of turnover for most companies in retail and consumer goods, based on its project work.
• Xero suggests that if overhead exceeds 35% to 50% of total costs in a service business, it is worth investigating where to cut back.

Our sample business sits at 17.2% of sales, which is reasonable for a small manufacturer but worth watching.

The more useful benchmark is your own trend. Calculate your overhead percentage every month. If it climbs for two or three months while sales stay flat, overhead is growing faster than the business, and that is your cue to review the biggest categories.

Manufacturing Overhead: How to Calculate and Allocate It

Manufacturers face a timing problem. Product costs are needed when the job is quoted, but the actual overhead bill only arrives at month end. The answer is a predetermined overhead rate.

The Predetermined Overhead Rate

Predetermined overhead rate = Budgeted annual overhead ÷ Budgeted annual allocation base

Our manufacturer budgets $103,200 of overhead for the year and 12,000 direct labor hours. That gives a predetermined rate of $8.60 per labor hour, which it uses to cost every job as the work happens.

Applied vs Actual Overhead

In March, the business actually spends $9,100 on overhead and works 980 direct labor hours. It applies 980 × $8.60 = $8,428 of overhead to production. Actual overhead is $672 higher than applied, so overhead is under applied by $672. If actual overhead had come in lower, it would have been over applied.

The Normal Capacity Rule

Under IAS 2, the international standard for inventories, fixed production overhead is spread across inventory based on the factory’s normal capacity, not on whatever it happened to produce. India’s Ind AS 2 follows the same principle.

Say fixed production overhead is $60,000 a year and normal capacity is 12,000 units, so each unit carries $5. If a slow year produces only 9,000 units, just $45,000 goes into inventory. The other $15,000 is expensed in the period. This stops a quiet year from inflating the value of your stock. Administrative and selling overhead never go into inventory at all.

How to Record Overhead Costs: Journal Entries

This is the question accountants actually ask: how do you account for overheads in the books?

Service and Trading Businesses

Most small businesses simply expense overhead as it is incurred. Paying the monthly rent looks like this:

Manufacturers Using a Predetermined Rate

Manufacturers collect overhead in a holding account, apply it to production, then clear the difference. Using the March numbers above:

1. Record actual overhead as it is incurred:

2. Apply overhead to production at the predetermined rate:

3. Clear the $672 under applied overhead at period end:

If overhead had been over applied, the last entry would flip: debit manufacturing overhead and credit cost of goods sold. When the difference is large, many businesses split it across work in progress, finished goods and cost of goods sold instead of putting it all in one place. For the basics of debits and credits, see our guide to journal entries in accounting.

Overhead in Construction Estimates and Service Businesses

Overhead Charges in Estimation and Costing

In construction, overhead is added to the estimate as a percentage, because a single project cannot carry the whole head office. Industry estimating guides in India typically load site overhead at about 5% to 10% and head office overhead at about 3% to 8% of contract value, with total overhead and profit often landing between 15% and 30% on top of direct cost. Contractor profit commonly sits around 8% to 15%, and is often capped near 10% in government work.

A simple example: direct cost of ₹10,00,000, plus 7% site overhead (₹70,000) and 5% head office overhead (₹50,000), gives ₹11,20,000. Add 10% profit (₹1,12,000) and the quoted price is ₹12,32,000. Always check the percentages your client or department prescribes before you bid.

Overhead in a Service Business

Service firms price overhead per billable hour. If an agency carries $60,000 of overhead a year and bills 1,500 hours, every billable hour must carry $40 of overhead on top of the staff cost behind it. Price below that and each project quietly loses money, even when the team is fully booked.

How to Build an Overhead Budget

An overhead budget is your plan for indirect spending over the coming year, broken down by month and category. It is how you spot overhead creep before it shows up in the profit.

1. Start from last year’s actual overhead, by category.
2. Add known changes: rent increases, new hires, new software, insurance renewals.
3. Separate fixed, variable and semi variable costs, and link the variable ones to your sales forecast.
4. Spread the total across the 12 months, timing annual payments in the month they fall due.
5. Compare budget to actual every month and investigate any category more than 10% over.

How Overhead Costs Are Taxed by Country

Most overhead is tax deductible almost everywhere, as long as it is a genuine business cost and you keep the paperwork. The details differ by country, so here is the picture in four markets where business owners ask about this most.

United States

The IRS generally allows businesses to deduct overhead as ordinary and necessary business expenses. Businesses that produce or resell goods may have to capitalize some indirect costs into inventory under the uniform capitalization rules. Small businesses that meet the gross receipts test, with average annual gross receipts of $32 million or less for tax years beginning in 2026, are generally exempt from those rules. The Internal Revenue Service publishes guidance for each business type.

India

The Income-tax Act, 2025 took effect on 1 April 2026, replacing the Income Tax Act, 1961, so check current section references on the Income Tax Department website before you file. Business overhead such as rent, salaries and professional fees remains deductible when incurred for the business. Under GST, input tax credit is available on many overhead purchases, though some items are blocked. For inventory, Ind AS 2 and AS 2 keep administrative and selling overhead out of stock value.

Nigeria

The Nigeria Tax Act, 2025 took effect on 1 January 2026 and replaced the Companies Income Tax Act. Small companies, with turnover of ₦50 million or less and fixed assets of ₦250 million or less, pay 0% company income tax, while other companies pay 30%. Two rules matter for overhead: expenses are not deductible where VAT was due on them but not paid, and foreign currency expenses are deductible only at the official exchange rate. Tax administration moved from FIRS to the Nigeria Revenue Service.

Philippines

Corporations can deduct overhead as itemized expenses, backed by official receipts, or elect the optional standard deduction of 40% of gross income instead of itemizing. Entertainment, amusement and recreation expenses are capped at 0.5% of net sales for sellers of goods and 1% of net revenue for service businesses. The Bureau of Internal Revenue sets the receipt and filing requirements.

Why Calculating Overhead Costs Matters

Pricing That Actually Covers Your Costs

A price that only covers materials and labor loses money on every sale. The overhead rate tells you how much each job, unit or hour must carry before profit begins.

A Realistic Break Even Point

Overhead is the main fixed cost in break even analysis. The higher it is, the more you must sell before you make a profit.

Profitability by Product, Branch or Client

Allocating overhead shows which products and clients truly make money once their share of rent, admin and software is counted.

Better Budgets and Forecasts

When you know how each overhead line behaves, you can predict next year’s costs instead of guessing.

Cleaner Financial Statements

Classifying overhead correctly keeps your gross margin honest and your profit and loss statement comparable from month to month.

How to Reduce Overhead Costs

1. Review every overhead line quarterly and cancel what nobody uses, starting with software seats and subscriptions.
2. Renegotiate before renewals. Put contract end dates in a calendar 30 to 60 days ahead.
3. Rethink space. Subleasing, downsizing or a hybrid setup can cut rent and utilities.
4. Outsource specialist work such as payroll, bookkeeping or IT support when a full time hire is not justified.
5. Consolidate vendors and tools that do the same job.
6. Improve energy efficiency to bring down semi variable utility costs.
7. Automate repetitive admin so your team spends less time on manual entry.

A simple rhythm keeps overhead in check. Every month, compare actual overhead to budget by category and flag new recurring vendors. Every quarter, renegotiate, cancel and plan. A good starting point is learning how to track your business expenses consistently.

How Enerpize Tracks and Allocates Overhead

Enerpize is a cloud based, all in one ERP platform for small and medium sized businesses, combining accounting, inventory, HR, sales and CRM in a single system. For overhead, four features do most of the work.

Expenses and Recurring Costs

Record every overhead expense against the right account in your chart of accounts, and set rent, subscriptions and other repeating bills as recurring expenses so nothing is missed.

Cost Centers for Allocation

Assign overhead to cost centers such as branches, departments or projects, so you can see exactly how much overhead each part of the business carries. Our guide to cost centers explains how to set them up.

Indirect Costs in Manufacturing

The Manufacturing module lets you add indirect costs to production, so factory overhead is included in the cost of what you make rather than sitting in a separate spreadsheet.

Reports That Show the Real Number

Profit and loss, expense and cost center reports show your overhead by category and period, so you can calculate your overhead percentage any day of the month.

Key Takeaways

1. Overhead costs are the indirect expenses you pay to keep the business open, whether or not you sell anything.
2. Overhead can be fixed, variable or semi variable, and administrative, selling or manufacturing.
3. Total overhead is the sum of every indirect cost, and the overhead rate divides it by an allocation base such as labor cost, hours or sales.
4. Track your overhead percentage monthly. Your own trend is a better warning sign than any industry average.
5. Manufacturers apply overhead with a predetermined rate, then clear any under or over applied balance at period end.
6. Most overhead is tax deductible, but the rules differ by country and changed in 2026 in both India and Nigeria.

Frequently Asked Questions

What is overhead cost in simple words?

Overhead cost is what it costs to keep your business open, regardless of how much you sell. Rent, insurance, utilities, admin salaries and software are typical examples. If you would still pay it in a month with zero sales, it is overhead.

Is overhead a fixed or variable cost?

Overhead can be either, or both. Rent and insurance are fixed overhead, shipping supplies and commissions are variable overhead, and utilities with a base charge plus usage are semi variable. Most small businesses carry mostly fixed overhead.

What is a good overhead percentage?

It depends on the industry. EFS Consulting puts retail and consumer goods overhead at around 12% to 15% of turnover, while Xero suggests service businesses investigate if overhead exceeds 35% to 50% of total costs. Your own month to month trend is the most useful benchmark.

How do I calculate overhead cost per unit?

Divide total overhead for the period by the number of units produced in the same period. For example, $8,600 of monthly overhead across 2,000 units gives an overhead cost per unit of $4.30.

What is the difference between overhead and operating expenses?

Overhead is the indirect part of your costs. Operating expenses is the income statement line where most overhead appears, alongside some costs that are not overhead. Manufacturers also carry factory overhead inside cost of goods sold rather than operating expenses.

Is salary an overhead cost?

It depends on the role. Salaries of admin, finance, HR and management staff are overhead. Wages of people who make the product or deliver client work are direct labor. Sales salaries are selling overhead, with commissions often treated as variable overhead.

What are overhead charges in estimation and costing?

Overhead charges are the percentages added to a construction or engineering estimate to cover site and head office costs that no single item carries. In India, industry practice typically loads site overhead at about 5% to 10% and head office overhead at about 3% to 8% of contract value.

Are overhead costs tax deductible?

Generally yes, when they are genuine business expenses supported by records. Some rules limit how and when you deduct them, such as US inventory capitalization rules for larger producers, the 40% optional standard deduction in the Philippines, and VAT payment conditions in Nigeria.

What happens to over applied or under applied overhead?

At period end, the difference between applied and actual overhead is cleared, usually to cost of goods sold. Under applied overhead increases cost of goods sold, and over applied overhead reduces it. Large differences are often spread across inventory and cost of goods sold.

Is water an overhead cost?

Yes, in most businesses. Water is a utility that supports the whole operation, so it is overhead. The exception is a business where water goes directly into the product, such as a beverage maker, where it is a direct material.

About the Author

Omar El Bahr is a Senior Digital Growth Specialist at Enerpize, where he leads SEO, content strategy, and organic growth across international markets. He is a Forbes Communications Council contributor and has written for Entrepreneur on business communication and digital strategy.

Disclaimer: This article is for general information only and does not constitute accounting, tax or legal advice. Tax rules and accounting standards change, so confirm current requirements with a qualified accountant or your local tax authority before acting.