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Job Bid Builder

Build a complete contractor bid from labor, materials, equipment, subs, overhead, and profit

Free bid builder for general contractors, subcontractors, and estimators who need to assemble a complete project bid from itemized cost categories. Enter direct costs for labor, materials, equipment, and subcontractors. Add overhead as a percentage or fixed amount, then set your profit margin or markup. The calculator returns total bid price, cost per square foot, markup versus margin comparison, and an optional contingency line item. Includes a bond cost estimator for public work bids that require payment and performance bonds.

Pro Tip: Most contractors confuse markup with margin, and the difference compounds fast on large bids. A 20% markup on $100,000 in costs yields a $120,000 bid and $20,000 gross profit, which is a 16.7% margin. If you intended a 20% margin, the bid should be $125,000. On a $500,000 project, that misunderstanding leaves $25,000 on the table. Always confirm whether your company targets a margin or a markup, and make sure your estimating software matches. This calculator shows both numbers side by side so you can verify.

Calculate fully-burdened hourly labor rates for your crew

Hourly Burden Calculator →

Verify markup versus margin conversions

Markup & Margin Calculator →

Estimate equipment ownership costs for your bid

Equipment Ownership Cost Calculator →

Calculate bonding capacity before bidding bonded work

Bonding Capacity Estimator →

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Job Bid Builder
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How It Works

  1. Enter Direct Costs

    Input labor cost (total crew hours times burdened hourly rate), material cost (quotes from suppliers), equipment cost (rental rates or ownership cost per day times duration), and subcontractor quotes. Each category is tracked separately for cost breakdown reporting.

  2. Set Overhead Percentage

    Enter your company overhead as a percentage of direct costs. This covers office rent, insurance, vehicles, accounting, estimating time, and other indirect costs not tied to a specific job. CFMA benchmarking data shows typical overhead ranges from 8% to 20% of revenue depending on company size and trade.

  3. Set Profit Target

    Enter your profit as a markup percentage on total cost. The calculator applies this to the total cost plus contingency and shows the resulting bid price and effective margin. Common net profit targets for contractors range from 10% to 20% markup (roughly 8% to 15% effective margin) depending on risk, competition, and project type.

  4. Add Contingency and Bond Costs

    Optionally add a contingency percentage (typically 3% to 10% of direct costs) for unknowns, scope gaps, or uncertain site conditions. If the project requires a surety bond, enter the bond rate (usually 1% to 3% of the contract price) and the calculator adds it to the final bid.

  5. Review Bid Summary

    The output shows the itemized cost breakdown, subtotals by category, overhead amount, profit amount, contingency, bond cost, and final bid price. A cost-per-square-foot figure is included if you enter the project area. Export the summary as a PDF or CSV for your proposal package.

Built For

  • General contractors assembling lump-sum bids for residential remodels or commercial tenant improvements
  • Subcontractors pricing their scope of work (electrical, plumbing, HVAC) for GC bid packages
  • Small contractors and sole proprietors verifying that overhead and profit are adequately covered before submitting a quote
  • Estimators comparing bid scenarios at different profit margins to find the competitive sweet spot
  • Construction managers reviewing subcontractor bids to verify that markup and contingency percentages are reasonable

Features & Capabilities

Markup vs. Margin Clarity

Enter profit as a markup on cost and the calculator shows the resulting effective margin (profit as a percentage of bid price). Many contractors accidentally confuse markup and margin, leaving profit on the table. The effective margin is always lower than the markup percentage.

Enter profit as markup on total cost Shows effective margin (profit / bid price) automatically Industry profit benchmarks by trade for reference

Bond Cost Estimator

Calculates the surety bond premium as a percentage of the final contract price. Bond rates vary by contractor qualification, project size, and bonding company. The calculator applies the rate to the total bid including overhead and profit, as sureties charge on the full contract amount.

Adjustable bond rate from 0.5% to 5% of contract price Bond cost added to the final bid price Supports payment bond, performance bond, or combined

Cost Breakdown Report

Generates an itemized summary showing each cost category as a percentage of the total bid. Useful for identifying whether labor, materials, or subs dominate the project cost, and for benchmarking against industry averages from RSMeans or CFMA data.

Pie chart breakdown by cost category Cost per square foot if project area is entered PDF and CSV export for proposal packages

Assumptions

  • Labor costs are assumed to be fully burdened (wages plus payroll taxes, insurance, and benefits). Use the Hourly Burden Calculator if you need to compute burdened rates.
  • Overhead percentage is applied to total direct costs. Some companies allocate overhead differently (e.g., as a percentage of labor only). Adjust your input accordingly.
  • Bond cost is calculated on the total contract price including overhead and profit. Some bid forms require the bond cost to be listed separately.
  • Contingency is intended to cover estimating uncertainty, not scope changes. Scope changes should be handled through the change order process.

Limitations

  • Does not generate a full CSI-format estimate with division breakdowns.
  • Does not account for escalation clauses on multi-year projects.
  • Does not model unit-price bid formats (only lump-sum). Unit-price bids require separate quantity takeoff tools.
  • Does not include sales tax calculations on materials, which vary by state and municipality.
  • Does not validate whether the bid price is competitive for a given market. Use historical bid-to-win ratios for that analysis.

References

  • RSMeans Construction Cost Data - R.S. Means Company, annual edition. Industry standard for unit cost benchmarking.
  • CFMA (Construction Financial Management Association) - Annual Financial Survey of the Construction Industry. Benchmarks for overhead, profit, and financial ratios by trade and company size.
  • SBA/SCORE - Small Business Administration guidance on contractor pricing, overhead allocation, and profit targets for small construction firms.
  • AGC (Associated General Contractors) - Contract Documents and Estimating Best Practices.

Frequently Asked Questions

Markup is a percentage added on top of your cost. Margin is the percentage of the final selling price that is profit. They are different denominators for the same dollar amount. Example: if your cost is $80,000 and you sell for $100,000, the markup is 25% ($20,000 / $80,000) and the margin is 20% ($20,000 / $100,000). The formulas to convert: Margin = Markup / (1 + Markup), and Markup = Margin / (1 - Margin). A 10% markup equals a 9.09% margin. A 10% margin equals an 11.11% markup. The gap widens at higher percentages, so confirming which method your company uses is critical for accurate bidding.
CFMA survey data shows that overhead as a percentage of revenue typically falls between 8% and 20% for most construction trades. Smaller companies (under $5M annual revenue) tend to run 12% to 20% because fixed costs like insurance, office space, and vehicles are spread over fewer jobs. Larger companies often achieve 8% to 14% through volume. Specialty subcontractors (electrical, mechanical) tend to run higher overhead than general contractors because of licensing, continuing education, and specialized tool inventories. Calculate your actual overhead by totaling all indirect costs from your last fiscal year and dividing by total revenue.
Contingency depends on how well-defined the scope is and how much risk the project carries. For well-documented projects with complete drawings and specs, 3% to 5% of direct costs is common. For projects with incomplete drawings, unknown site conditions (renovation, environmental), or aggressive schedules, 7% to 10% is more appropriate. Public agency bids often do not allow a visible contingency line item, in which case you build it into your unit prices or overhead. For negotiated private work, a clearly labeled contingency can actually build trust with the owner because it shows you have identified specific risks rather than padding every line item.
Include bond costs whenever the bid documents require a payment bond, performance bond, or both. Most public works projects above $100,000 to $250,000 (threshold varies by state and the federal Miller Act threshold is $150,000) require bonds. Many private owners also require bonds on larger projects. Bond premiums are typically 1% to 3% of the contract price for well-qualified contractors with strong financials and experience. New contractors or those with weak balance sheets may pay 3% to 5% or may not qualify at all. The premium is a legitimate project cost and should be included in your bid price, not absorbed from profit. Check the bid instructions carefully, as some forms require bond cost to be listed as a separate line item.
Yes, in most cases. Your company incurs real costs managing subcontractors: reviewing submittals, coordinating schedules, processing pay applications, handling punch list items, and carrying insurance that covers sub operations on your site. A common approach is to apply a reduced overhead rate to subs (5% to 10%) compared to your own labor and materials (full overhead rate). Some companies apply a flat markup of 10% to 15% on subs that covers both overhead and profit. Whatever method you use, be consistent and make sure it covers your actual cost of managing sub work. Do not pass through subcontractor costs at zero markup unless the sub pricing already includes your management fee.
Disclaimer: This calculator provides bid estimates for planning purposes. Final bid prices depend on local market conditions, project-specific risks, and your company's actual cost structure. Verify all inputs against supplier quotes, labor agreements, and current insurance rates before submitting any bid. ToolGrit is not responsible for bid outcomes.

Learn More

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How surety underwriters evaluate contractors, what working capital means for your bond limit, and practical steps to increase your bonding capacity.

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