The Hidden Margin Killer Sitting in Your Inbox

Apr 19, 2026

All of us are getting gut-punched every day at the pumps.

Most of us are paying 20% more than we paid 2 months ago for fuel.

Some as high as 30%.

The increased cost at the pumps is not hard to miss. It’s in our face.

But there is another cost that many fixed-price builders and GCs are missing.

It’s showing up in your inbox.

You just got a supplier invoice.

The material cost and freight look right. 

You budgeted for it. 

You’re good.

Then you scroll down.

Fuel surcharge: $40.55.

And if you didn’t plan for it, that surcharge just ate your margin in an already slow economy.

This is happening everywhere right now.

Fuel costs are unpredictable, suppliers are passing every cent downstream, and builders and remodelers are the last ones holding the bag.

Most guys see it, shrug, and move on.

The ones building real profit don’t.

Scenario: $399 Flooring + Freight, 50% Markup Scenario

This scenario is from one of my clients, a Kitchen and Bath design center.

They ordered some flooring: $399 + tax.

Freight was quoted at $106.44 – no problem.

It was in the budget.

But there’s a new $40.55 fuel surcharge.

The Math that Matters

Let’s do a quick comparison of margins with this easter egg.

BEFORE Surcharge

(Note: a 50% markup on cost = 33.3% gross margin — these are different numbers and worth knowing.)

AFTER Surcharge (same markup applied to original cost only)

This is what happens when the surcharge arrives on the invoice, but you already quoted the job:

The surcharge alone dropped your margin from 33.3% to 27.8%.

 
Now, $40.55  isn’t much, and on a $60,000 kitchen remodel it is a drop in the bucket.

But if you haven’t already adjusted your pricing or updated the inputs in your estimating template, your margins have shrunk.

There may not be a fuel surcharge on your sheet rock order from Home Depot, but you are paying more for those materials.

All materials arrive at the store on diesel trucks.

Suppliers will only tolerate higher freight costs for so long.

Don’t get stuck financing your customer’s reno.

6 Ways To Protect Your Margins From Rising Fuel Costs

  1. Mark up the total delivered cost, not the base material cost. Surcharges are part of your cost. Treat them that way.
  2. Add a fuel surcharge line to your own quotes. If your suppliers pass it to you, you pass it to your customer. Transparently. Most customers understand. When fuel costs come down, remove the surcharge.
  3. Review supplier invoices line by line. Surcharges are easy to miss when you’re moving fast. I get it, the invoices hit your inbox, and you forward them to your bookkeeper as fast as possible… slow down. Build a habit of catching them before they kill your job margin.
  4. Build a buffer for material costs into your estimates. Build a 5–8% contingency on materials into your quotes and agreements for freight volatility before it becomes a problem. Fixed-Price margins are only as firm as your agreements.
  5. Track fuel costs as its own expense category. If you can see it clearly, you can manage it. If it’s buried in “materials,” you’ll never know how much it’s costing you.
  6. Shorten how long your quotes are good for. Fuel costs, on average, increased 21.1% in March 2026. Diesel heating oil jumped as much as 43% in some parts. If your quotes are good for 60 days, your exposure to fuel price volatility increases. Manage your risk: opt for 14 or 21 days before the quote expires.

Increasing fuel costs aren’t going away any time soon.

The builders and GCs who adjust their numbers will protect their profit.

 

 

P.S. Email Crew@strucs.co with something you want me to talk about. I’ll add it to our list.

About Built To Profit Insights

We regularly share real insights from the front lines of the construction industry, drawn from hands-on experience, honest feedback, and what actually works.

You won’t find theoretical sugar-coated advice here, just the hard truths Contractors and Builders need to grow. If you’re ambitious, open-minded, and serious about building something meaningful and profitable, you’re in the right place.

Subscribe below.

Recent Insights