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Job Costing14 min read

What Do Rising Material Costs Really Do to Your Profit Margin?

Rising material costs do not just shrink your profit margin—they can turn a job you bid at 18% gross profit into a breakeven disaster if you are not tracking cost changes between estimate and invoice.

Cory Salisbury
Cory Salisbury
Founder & Fractional CFO • Salisbury Bookkeeping

What Do Rising Material Costs Really Do to Your Profit Margin?

For every $100K job, a 10% unexpected material spike eats roughly $3,000-$5,000 of profit.

Why Material Cost Increases Hit Contractors Harder

Construction is uniquely brutal because you are often locked into a fixed price before you buy a single sheet of plywood. A restaurant can raise menu prices next week. You cannot.

What Should You Do When Material Costs Jump After You Have Already Bid?

  1. Check your contract for a material escalation clause
  2. Talk to the client before you buy
  3. Find a substitute product
  4. Eat it and fix your system

How to Build Material Cost Tracking Into Your Estimating System

Save estimates as budgets in your accounting system. Code every material expense to the job. Run budget-vs-actual reports weekly.

A Simple Rule for Volatile Materials

Add a 5-10% material escalation buffer into estimates for jobs with lead times over 60 days.

The Real Cost of Not Tracking by Job

A $2M HVAC contractor running 80 jobs at a guessed 20% margin is probably actually making 12-14% — losing $120K-$160K with no idea where it went.

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