← Asphalt driveway paving bid calculator
Paving fabric over cracks has a sticker price: $0.55 a square foot in this calculator's own default rates. On this calculator's fabric-over-cracks preset — a 2,000 sq ft mill-and-overlay plus a 150 sq ft apron, 2,150 sq ft of paved area — that is $1,182.50 of material. It is not what fabric should add to the price you send.
Open the free asphalt driveway paving bid calculatorUsing this calculator's own default crew rates (16% overhead, 28% target margin) on its 2,150 sq ft mill-and-overlay preset:
| Fabric | Total cost | Price |
|---|---|---|
| Without fabric | $6,274.40 | $8,714.45 |
| With fabric | $7,646.10 | $10,619.59 |
| Difference | $1,371.70 | $1,905.14 |
The $1,182.50 of fabric material raises total cost by $1,371.70, not $1,182.50 — 16% overhead applies to the added material the same as it applies to everything else in the job ($1,182.50 × 1.16 = $1,371.70). Then, because price is total cost divided by (1 − 28%), that $1,371.70 of added cost turns into $1,905.14 of added price. Charging only the $1,182.50 material line — writing "+fabric, $1,182.50" on the bid instead of re-running the job through the calculator — leaves $722.64 of overhead and margin uncollected on this one job.
It is easy to treat overhead and margin as something that lives on the labor and the base mix tons, and to pass a late add-on through at its raw material cost because it feels like "just materials." This calculator does not draw that line: overhead is a percentage of total direct cost, and price is total cost marked up to the target margin, whichever line the cost sits on. A material cost added after the estimate is drafted — fabric, a permit fee, extra gravel — carries the same overhead and margin share as everything already in the bid, or the bid quietly stops hitting its own target margin on the jobs that use it.
Open the asphalt driveway paving bid calculator, load the "2,000 sq ft mill-and-overlay, 2.5 in, fabric over cracks" preset, and toggle the fabric checkbox on and off to see the price move by $1,905.14 rather than by the $1,182.50 material line alone. This is the same arithmetic as how much to charge to pave a driveway and this calculator vs. a flat rate per square foot.
No. At this calculator's own default crew rates (16% overhead, 28% target margin), adding paving fabric to a 2,150 square foot mill-and-overlay costs $1,182.50 in material (2,150 sq ft x $0.55/sq ft) but should add $1,905.14 to the price. Charging only the $1,182.50 material line leaves $722.64 of overhead and margin uncollected on that job.
Overhead first, then margin, in that order. The $1,182.50 of fabric material raises total cost by $1,371.70 once 16% overhead is applied on top of it ($1,182.50 + $189.20 overhead). Because price is total cost divided by (1 minus the 28% target margin), that $1,371.70 of added cost turns into $1,905.14 of added price — not the $1,182.50 the material alone cost.
No. Fabric is its own checkbox, off by default, and adds nothing when left unchecked. It only changes the price on the square footage it actually covers — this calculator's own fabric-over-cracks preset covers a 2,000 square foot driveway plus a 150 square foot apron, 2,150 square feet in total.
Any material line added after the estimate is drafted has the same gap: overhead and margin are set as a share of total cost and total price, not of the base scope alone, so a cost added without re-running the calculation is added at its raw material price — short by whatever overhead and margin that line was supposed to carry.
No warranty. This free page is not paving, construction, legal, tax, or financial advice. You are responsible for reviewing and verifying its output before relying on it. It is hosted best-effort with no SLA: it may be slow, broken, moved, or taken offline without notice. Nothing you type on the calculator is ever sent anywhere. Free and open source — the code is under an MIT licence; support is entirely optional and never changes what the tool does.