How to Calculate and Allocate Overhead for Food Manufacturing

Picture this. A founder is in a meeting with a regional grocery buyer. The buyer is interested in the brand, but before committing shelf space, they want to see the unit economics. The founder pulls up their COGS number from QuickBooks: ingredients, packaging, and the co-packer fee. The buyer nods, then asks about facility overhead, equipment depreciation, and quality control labor. The founder goes quiet. Those numbers are not in the spreadsheet. The buyer passes. Not because the product is bad, but because they cannot evaluate whether the brand is actually viable at scale.

This scenario plays out constantly in the food industry. Founders are meticulous about ingredient costs. They negotiate packaging down to fractions of a cent. But overhead, the costs that exist because they run a manufacturing operation at all, gets lumped into SG&A, buried in a catch-all expense category, or ignored entirely. The result is a COGS number that looks healthy on paper but falls apart the moment someone asks a serious question about it.

This guide walks through exactly how to identify, calculate, and allocate overhead for a food manufacturing operation. The math is not complicated. The discipline required to do it consistently is what most brands are missing.

What Overhead Actually Is for a Food Manufacturer

Overhead is every production-related cost that is not a direct ingredient or direct packaging material. The word "production-related" is doing important work in that sentence. If a cost exists because you make product, it is overhead. If it exists because you run a company, it is SG&A. The line matters because overhead belongs in COGS, and SG&A does not.

For a food manufacturer, overhead typically includes the following categories. Facility costs cover rent or mortgage payments on your production space, property taxes, and any facility-specific insurance. Utilities include electricity, water, gas, and refrigeration costs tied to production. Equipment depreciation is the annual cost of spreading a piece of equipment's purchase price across its useful life. Quality control labor covers the wages of any team member whose primary job is testing, inspecting, or certifying product. Food safety costs include SQF or BRCGS certification fees, third-party audit costs, and lab testing fees. Indirect labor covers production managers, sanitation crews, and anyone else who supports manufacturing but does not directly touch the product. Maintenance and repair costs for production equipment round out the list.

None of these costs disappear when you are not running a production batch. They are fixed or semi-fixed obligations that exist because you operate a food manufacturing business. That is exactly why they need to be allocated to the units you produce. If you do not allocate them, you are effectively pretending they do not exist, and your COGS is understated by whatever those costs total.

Why Most Food Brands Undercount Overhead

The most common reason food brands undercount overhead is that they start with a recipe-based cost model and never expand it. Early on, a founder builds a spreadsheet that adds up ingredient costs, packaging costs, and maybe a co-packer fee. That spreadsheet becomes the COGS model. It gets imported into QuickBooks. It gets used in investor decks. It gets sent to buyers. And it never gets updated to include the overhead costs that accumulate as the business grows.

A second reason is category confusion. Many founders treat overhead as an operating expense rather than a cost of goods. They see facility rent as a business expense, not a manufacturing cost. Technically, for a company that leases office space, that is correct. But for a company that leases a production facility, the rent is a manufacturing cost and belongs in COGS. The same logic applies to utilities, equipment, and QC labor. Misclassifying these as SG&A makes gross margins look better than they are and operating expenses look worse than they are. Neither is useful.

A third reason is that overhead is harder to track than direct costs. An ingredient purchase shows up as a line item on a purchase order. A co-packer invoice is a single number. But overhead is spread across a dozen expense categories, paid on different schedules, and requires a deliberate calculation to convert into a per-unit cost. Most brands do not have a system for doing that calculation, so they skip it.

The consequence is not just an inaccurate COGS number. It is a series of bad decisions made on top of that inaccurate number. Pricing decisions. Margin targets. Retailer negotiations. New SKU launches. All of them are built on a foundation that is missing a meaningful chunk of actual cost. For more on how direct cost errors compound into larger COGS problems, see our guide to CPG COGS optimization for food brands.

The Overhead Allocation Formula

The core formula for overhead allocation is straightforward. You divide your total overhead by your total allocation base to get an overhead rate. Then you apply that rate to each unit or SKU.

The allocation base is the denominator in that formula, and choosing the right one matters. The most common options for food manufacturers are total units produced, total direct labor hours, and total machine hours. Each produces a different overhead rate and a different cost per SKU. The right choice depends on how your production operation actually works.

Once you have your overhead rate, you add it to your direct material cost and direct labor cost to get a fully loaded COGS per unit. That number is what belongs in your financial model, your pricing calculations, and your retailer cost breakdowns.

How to Choose the Right Allocation Base

The allocation base question is where most brands either get this right or get it wrong. Using the wrong base produces overhead allocations that do not reflect how your facility actually consumes resources, which means some SKUs get over-allocated and others get under-allocated.

Units produced is the simplest base and works well when your SKUs are similar in size, complexity, and production time. If you make three flavors of the same 2-oz snack bar on the same line with the same run time, allocating overhead equally per unit is reasonable. Every unit consumes roughly the same amount of facility time, equipment wear, and labor support.

Direct labor hours is the right base when your SKUs vary significantly in how long they take to produce. A brand that makes a 2-oz snack bar and a 16-oz granola bag on the same line should not allocate the same overhead to each unit. The granola bag takes longer to fill, seal, and inspect. It occupies the line longer. It consumes more overhead per unit. Using labor hours as the base captures that difference.

Machine hours is appropriate when your overhead is dominated by equipment costs rather than labor. If you run a highly automated line where depreciation and maintenance are your biggest overhead items, machine hours is the most accurate reflection of how overhead is consumed. A SKU that runs on the filler for 20 minutes per batch consumes more equipment overhead than one that runs for 8 minutes.

For most small and mid-size food brands, direct labor hours is the most defensible choice. It is more accurate than units produced for mixed-SKU operations, and it is easier to track than machine hours for brands that do not have automated time-tracking on their equipment.

Step-by-Step: Calculating Overhead Rate for a Food Brand

Here is a worked example using real numbers. A food brand operates its own 4,000 square foot production facility. It produces eight SKUs across two product lines. The first step is to identify and total all overhead costs for the year.

The second step is to determine the allocation base. This brand produces 240,000 total units per year across all SKUs. The SKUs are similar enough in size and run time that units produced is a reasonable base for this example.

The third step is to build that $0.75 into the COGS for each SKU. If SKU A has $1.85 in direct materials and $0.30 in direct labor, the fully loaded COGS is $1.85 plus $0.30 plus $0.75, which equals $2.90. If the brand was previously reporting COGS of $2.15 (materials plus labor only), they were understating cost by $0.75 per unit, or 35 percent. That gap is not trivial. At 240,000 units, it represents $180,000 in unaccounted cost per year.

The fourth step is to recalculate whenever overhead costs change materially. If the brand signs a new lease at a higher rate, adds a piece of equipment, or hires a full-time QC technician, the overhead rate needs to be updated. A rate calculated 18 months ago on different cost assumptions is not a valid input for current pricing decisions.

How Overhead Allocation Changes by Production Model

The overhead calculation looks different depending on whether you operate your own facility, use a co-packer, or produce in a shared kitchen. Each model has a different overhead profile, and confusing them leads to either over-allocating or under-allocating costs to your SKUs.

Own Facility

If you own or lease your production space, you carry the full overhead burden described above. Rent, utilities, equipment, QC labor, certifications, insurance, and indirect labor all belong to you. This is the highest overhead scenario, but it also gives you the most control over production costs and capacity. The overhead rate calculation is straightforward: total all facility-related production costs and divide by your allocation base.

Co-Packer Model

If you use a co-packer, most of the facility and equipment overhead belongs to them. Their conversion fee is supposed to cover their facility costs, equipment depreciation, and labor. What you still carry is the overhead that lives on your side of the relationship: QC labor for managing the co-packer relationship and reviewing production records, food safety certification costs that are your responsibility, any equipment you own and send to the co-packer, and the time your production manager spends on scheduling, communication, and issue resolution.

Many co-packer brands assume their overhead is zero because they do not have a facility. That is wrong. The overhead is smaller, but it is real. A brand with one full-time operations manager at $65,000 per year, $8,000 in annual certification costs, and $4,000 in QC-related travel and testing has $77,000 in overhead that needs to be allocated to their SKUs. Ignoring it overstates margins by whatever that number works out to per unit.

Shared Kitchen

Shared kitchen operators typically pay an hourly or daily rate for facility access. That rate includes the facility overhead, so you do not carry rent or equipment depreciation separately. Your overhead is limited to any costs you pay outside the hourly rate: certifications, your own QC labor, and any equipment you bring in. The key is to make sure the hourly kitchen rate is captured in your COGS, not treated as a miscellaneous operating expense. It is a direct production cost.

For brands navigating cost increases across any of these production models, the repricing decisions that follow are covered in detail in our guide to repricing after ingredient cost increases.

Common Overhead Allocation Mistakes and How to Avoid Them

The first and most common mistake is using a stale overhead rate. Brands calculate their overhead rate once, usually at the start of the year or when they first build their cost model, and then never update it. Costs change. Facility rent increases. A new piece of equipment gets added. A QC technician gets hired. Each of these events changes the overhead rate, and if the rate does not update, every COGS figure built on top of it is wrong. The fix is to build a quarterly overhead review into your operations calendar and treat the overhead rate as a live number, not a static one.

The second mistake is misclassifying overhead as SG&A. This is partly an accounting convention issue and partly a discipline issue. The practical consequence is that gross margins look better than they are, which leads to pricing decisions that do not cover true costs. If you are not sure whether a cost belongs in COGS or SG&A, ask this question: does this cost exist because I manufacture product? If yes, it is overhead and belongs in COGS.

The third mistake is using units produced as the allocation base when SKUs have meaningfully different production times. A brand with a 4-oz product and a 24-oz product on the same line should not allocate the same overhead per unit to both. The 24-oz product takes longer to fill, uses more energy, and occupies the line longer. Allocating equal overhead per unit understates the cost of the larger SKU and overstates the cost of the smaller one. Switch to direct labor hours and the allocation becomes accurate.

The fourth mistake is forgetting to include depreciation. Equipment depreciation is a real cost. If you spent $120,000 on a filling line with a 10-year useful life, that is $12,000 per year in overhead that needs to be allocated to your units. Many founders treat capital equipment purchases as a one-time event and never factor the ongoing depreciation into their COGS. The result is that the cost of that equipment is invisible in their unit economics until the equipment needs to be replaced and they suddenly cannot afford to do it.

The fifth mistake is applying a single overhead rate to a business that has meaningfully different production lines or facilities. If you run two separate production lines with different cost profiles, a single blended overhead rate will over-allocate costs to the cheaper line and under-allocate to the more expensive one. The solution is to calculate a separate overhead rate for each line or facility and apply it only to the SKUs produced on that line.