Contractor Markup Calculator

Markup vs. margin: the mistake that bankrupts contractors

A 30% markup is not a 30% margin. Markup is applied on cost; margin is measured on price. A $6,000 job cost with 30% markup sells for $7,800: a 23% margin. Contractors who hear "the industry runs 30% margins" and apply 30% markup are quietly underpricing every job by 10 points. This calculator shows both numbers side by side so the difference stays visible.

Overhead is a job cost, not profit

The truck payment, liability insurance, your phone, the storage unit, unbillable estimate visits: that's overhead, and it runs 10–25% of direct costs for most trades. Markup applied to materials-plus-labor alone means overhead silently eats your "profit." The calculator applies overhead first, then markup, which is the order that keeps you solvent.

What markup should contractors charge?

General remodeling typically runs 20–35% markup; specialty trades 30–50%; small handyman jobs 50–100% (small jobs carry proportionally more overhead per hour). The honest floor: your markup must at least cover the profit you'd earn as someone else's employee, or the business is paying you less than a job would.

The warranty reserve most markup calculations skip

Overhead covers the truck and the office. Markup covers profit. Neither one, as calculated above, sets aside anything for the callback that shows up eight months after the job closes, a leaking fixture, a settling crack, a fix that falls under your workmanship warranty rather than a manufacturer's.

Many established contractors solve this by carving a small slice, often 1 to 3 percent, out of their markup specifically as a warranty reserve, tracked separately rather than spent as profit the day the final invoice clears. On a $20,000 job at a 2% reserve, that is $400 set aside against future callback labor and materials, not $400 less profit if the job never needs it, since unused reserve rolls forward.

Skip this and a bad year of callbacks comes straight out of pocket, on top of the crew hours you're not billing anyone for. Building the reserve into markup from the start turns an unpredictable cost into a planned one.

Related tools

Quoting a full project? Build the estimate in the job costing calculator: it works from target margin instead of markup. Check the classic shortcut on the 40 percent markup calculator, price product resale with the wholesale price calculator, and see how many jobs a month your overhead demands with the break-even calculator. Estimate materials with the construction cost estimator.

How markup, overhead and margin relate

When markup compounds: subcontractor tiers and material procurement

General contractors typically apply a 10–20% markup on subcontractor invoices on top of the sub's own markup. A plumbing sub billing $4,200 with 45% markup already baked in means your 15% GC markup adds another $630, bringing the client-facing number to $4,830. Failing to layer GC markup on sub costs is one of the most common margin leaks on commercial jobs. The same logic applies to materials purchased directly: a material markup of 20–35% is standard across roofing, framing, and mechanical trades to cover procurement time, storage risk, and delivery coordination that pure labor rates do not capture.

Specialty material categories carry higher norms. Electrical fixtures and HVAC equipment are commonly marked up 25–50% because lead times, warranty handling, and vendor relationships carry real cost. If your supplier offers a net-30 account, factor the carrying cost into markup - at a $50,000 material draw, 30 days of capital at 8% APR costs approximately $330, which should appear in your markup floor, not your contingency line.

Scope limits: what this calculator does not handle

The calculator outputs a single markup multiplier. It does not model retainage, which on public contracts commonly runs 5–10% withheld until project closeout - that withheld cash has a time-value cost your markup must absorb. It also does not adjust for prevailing wage requirements under the Davis-Bacon Act (federal projects over $2,000) or state equivalents, where labor costs can run 30–80% above market rate by trade and county.

Change order pricing is a separate calculation. A fixed markup applied to a change order often underprices the disruption cost, remobilization, and schedule compression. Many contractors apply a surcharge of 5–15% on top of standard markup for mid-project scope changes. Use the job costing calculator to baseline true costs before applying any multiplier, and cross-check your floor with the break-even point calculator to confirm the job covers fixed overhead at minimum volume.

Bid markup versus invoice markup

Bid markup and invoice markup are not interchangeable. Bid markup is applied to estimated costs with uncertainty baked in - most estimators add a 3–8% contingency before markup, not after. Invoice markup applies to actual documented costs and should match the contract terms exactly. Cost-plus contracts specify the allowable markup percentage - typically 10–15% on labor and materials with a separate 5–10% on subcontracted work. Charging a higher rate than the contract states on a cost-plus job constitutes overbilling and exposes the contractor to contract breach and, on federally funded projects, False Claims Act liability with penalties starting at $13,946 per false claim as of 2024 DOJ adjustment rates.