Material Price Variance vs. Material Usage Variance

When material costs come in over plan, there are two very different ways it can happen. You paid more per pound than you expected. Or you used more pounds than the work should have needed.

The first is a purchasing question. The second is a shop floor question. If you can't tell them apart, you end up fixing the wrong one.

Material price variance and material usage variance split the problem along that line. This post shows how to calculate both, how to read them together, and how to use them in pricing. The examples are illustrative.

What Is Material Price Variance, and Why Does It Matter?

Material price variance measures what you paid for material compared with the standard price. In many ERPs it's called purchase price variance, or PPV.

Material price variance = (actual price − standard price) × actual quantity

Positive is unfavorable. You paid more than standard.

It matters because material is a big share of product cost for many manufacturers, and its price moves with markets you don't control. Price variance is the early warning. It shows up when you buy, often weeks before the material is used and shipped in a product.

The common causes are market price changes, small rush orders at a higher price, a switch in supplier, freight and duties, and a standard price that hasn't been updated.

Price variance usually belongs to purchasing. But not always. If production schedules force rush buys, part of it belongs to planning.

What Is Material Usage Variance, and What Is It Really Tracking?

Material usage variance measures how much material you used compared with what the standard allows for the output you actually produced. It's also called material quantity or efficiency variance.

Material usage variance = (actual quantity used − standard quantity allowed) × standard price

Standard quantity allowed is units produced times the standard quantity per unit, which comes from the bill of materials. It uses the standard price on purpose, so price changes don't leak into the usage number.

What it's really tracking is waste. Scrap, rework that eats new material, setup pieces, cutting yield, overfills, theft, and counting errors all land here.

A good standard quantity includes normal scrap. If a finished enclosure has 3.4 lb of aluminum in it but you normally need 4.0 lb to make one, the standard should be 4.0 lb. Otherwise usage is unfavorable every month and people stop reading it.

How to Calculate Both Variances: A Step-by-Step Walkthrough

Here's an illustrative month for a shop making aluminum enclosures.

Step 1: Establish Your Standard Costs

The standard for one enclosure is 4.0 lb of aluminum sheet at $2.50 a pound. That's $10.00 of material per unit. The 4.0 lb includes normal trim and scrap.

If you're building standards from scratch, how to set standard costs that reflect production reality walks through it.

Step 2: Capture Actual Purchasing Data

During the month the shop bought 30,000 lb of sheet at $2.65 a pound. That's $79,500.

Use the actual landed price where you can. That's the supplier price plus inbound freight and any duties. Our glossary explains landed cost.

Step 3: Calculate Material Price Variance

($2.65 − $2.50) × 30,000 lb = $4,500 unfavorable.

That's calculated when the material is bought. Some companies calculate it when material is used instead. At use, it's $0.15 times the 29,400 lb used, or $4,410. The other $90 sits in inventory on the 600 lb still on the shelf, and comes out when that material is used.

I usually prefer recording it at purchase. You see price changes the month they happen, and purchasing gets the feedback while it's still useful.

Step 4: Capture Actual Production Data

The shop made 7,000 good enclosures and used 29,400 lb of sheet.

Standard quantity allowed is 7,000 times 4.0 lb, which is 28,000 lb.

Both numbers need to be right. Production counts come from completed work orders. Material used comes from issues to jobs, or from beginning inventory plus purchases minus ending inventory if you don't track issues.

Step 5: Calculate Material Usage Variance

(29,400 − 28,000) × $2.50 = $3,500 unfavorable.

The shop used 1,400 lb more than standard. That's about 5% more material than the work should have taken.

Step 6: Interpret the Two Numbers Together

Check the total first. Standard material for 7,000 units is $70,000. Actual material used, at actual price, is 29,400 times $2.65, which is $77,910. The difference is $7,910. That equals the $4,410 price variance at use plus the $3,500 usage variance. If it doesn't tie, an input is wrong.

	Amount
Standard material for actual output (28,000 lb × $2.50)	$70,000
Material price variance (at use)	$4,410 unfavorable
Material usage variance	$3,500 unfavorable
Actual material used (29,400 lb × $2.65)	$77,910

Now the conversation. Purchasing explains the $0.15 a pound. Production explains the 1,400 extra pounds. Those are two different meetings.

The two variances can also be connected. Here's the trap. Say purchasing switches to a cheaper supplier at $2.40 a pound. The sheet is thinner at the edges and the shop scraps more. Usage goes to 30,000 lb for the same 7,000 units.

	Calculation	Amount
Price variance	($2.40 − $2.50) × 30,000	$3,000 favorable
Usage variance	(30,000 − 28,000) × $2.50	$5,000 unfavorable
Net		$2,000 unfavorable

Purchasing looks good. The shop looks bad. The company is $2,000 worse off, before counting the labor and machine time spent on the parts that got scrapped. That's why I'd never judge purchasing on price variance alone.

The Most Common Mistakes Manufacturers Make With Variance Analysis

A standard price that never moves. If the standard is from two years ago, price variance is just inflation. It stops telling you anything about how purchasing did this month.

Freight and duties handled inconsistently. If the standard includes freight but freight bills get posted to overhead, price variance looks favorable and overhead looks high. Pick one treatment and stick with it. If you import, our post on tariffs in your manufacturing cost structure covers how duties fit in.

Unit of measure mismatches. Buying in pounds, issuing in sheets, and costing in square feet is a common source of fake variances. One wrong conversion factor can create a large usage variance every month.

Backflushing without counting. Many systems relieve material from inventory automatically at standard when a job completes. That means real usage only shows up when you do a physical count. Then a year of scrap lands in one inventory adjustment. Cycle counting your highest-value materials monthly fixes most of this.

Scrap that's never recorded. If scrapped parts aren't reported, they get absorbed somewhere else. Often they end up as a mystery inventory shortage.

Substitutions not recorded. If the floor uses a different gauge or grade than the BOM calls for, usage and price variances both get distorted.

Rewarding purchasing on PPV alone. It can push buyers toward big lots to get a price break, which ties up cash in inventory, or toward cheaper material that costs you in scrap.

How to Use Variance Analysis to Protect Your Margins

For price variance, the question is whether the change is temporary or permanent. If a supplier price is up for good, update the standard and look at your quotes. If it's a one-time rush order, find out why it was a rush.

Price variance is also your cue to look at contracts. If you have long-term customer agreements, material escalation language can protect you when your inputs move. Your attorney and your sales team should own that wording.

For usage variance, the question is where the material went. A simple scrap log by reason and by machine turns a dollar number into a list. Quality, setup, operator, and material defects all look different.

Look at both by material and by product, not just in total. A favorable total can hide an unfavorable variance on your most important part.

In food and beverage manufacturing, the usage side often shows up as yield and overfill. In metal fabrication it's usually nesting, drops, and scrap. The math is the same.

When Standard Costing Systems Make Variance Analysis More Effective

A standard costing system in your ERP makes this much easier. Price variance is booked automatically when you receive and match the vendor invoice. Usage variance is booked when you issue material to work orders and close them.

The system is only as good as the transactions, though. If people don't issue material to jobs, or don't report scrap, the variances will be wrong in a very organized way.

If you don't have a standard costing module, you can still do this monthly in a spreadsheet for your top materials. You need purchases by material, a production count, and a beginning and ending inventory count. For the bigger picture of how standards fit together, see the role of standard costing in manufacturing and our standard costing vs. actual costing page.

It also helps to have a regular monthly control process so someone actually reviews these. We describe one in financial management control process for manufacturers.

Turning Variance Data Into Pricing and Margin Decisions

Here's a simple illustrative case. A part sells for $25. Its standard cost is $18, and $8 of that is material. Gross margin is $7, or 28%.

Your main material goes up 6% and it looks permanent. Material cost on the part goes from $8.00 to $8.48. Total cost is now $18.48, and margin drops to $6.52, or about 26.1%.

Two points of margin on one part may not sound like much. Spread across every part that uses that material, it adds up quickly. The price variance tells you which materials moved. The standard cost tells you which parts use them. Put those together and you have a repricing list.

Usage variance belongs in the same conversation. If a part runs 10% over standard material every time, it's either a process problem to fix or a standard to correct, and if it's the standard, the quote is too low.

For a full approach to pricing reviews, see how to conduct a pricing and margin analysis. For how material flows through cost of goods manufactured, see the CFO's playbook for cost of goods manufactured. And labor has its own pair of variances, covered in labor rate vs. labor efficiency variance.

How Accounovation Helps Manufacturers Take Control of Material Costs

We act as the finance team for manufacturers between about $3M and $30M in revenue. On material, that usually means cleaning up standard prices and BOM quantities, fixing unit of measure and freight treatment, setting up cycle counts for high-value items, and reporting price and usage variance by material every month.

Then we use it. When a material moves, we help you see which parts and customers are affected and what that does to margin. That's part of our pricing and margin analysis work, and our broader manufacturing accounting service. Our variance analysis guide shows how material fits into the full monthly review, and calculating labor and overhead cost covers the rest of the product cost. Happy to jump on a call if helpful.

Frequently Asked Questions

What's the difference between material price variance and material usage variance?

Price variance is about what you paid per unit of material compared with standard. Usage variance is about how much material you used compared with what the standard allows for your actual output.

How often should a manufacturer calculate material variances?

Monthly at minimum, as part of the close. For your highest-value materials, a weekly look at purchase prices and scrap is often worth the time.

What should I do if my material variances are consistently unfavorable?

Check the standard first. An old price or a BOM quantity without a scrap allowance will show unfavorable every month. If the standard is right, look at supplier pricing for price variance, and at scrap and yield by machine for usage.

Should price variance be recorded at purchase or at use?

Either works if you're consistent. I usually prefer at purchase, because you see price changes sooner. At use matches the variance to the product it went into, which some owners find easier to read.

Can a favorable price variance be bad news?

Yes. If the cheaper material causes more scrap or rework, the usage variance can more than wipe out the savings. Always read the two together.