Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Estimated bond premium
$45,200
Effective blended rate
1.08%
Amount in tier 1 bracket
$1,000,000
Amount in tier 2 bracket
$3,200,000
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How to use this
- 1Enter contract value ($).
- 2Enter first bracket ceiling ($).
- 3Enter tier 1 rate (%).
- 4Enter tier 2 rate (%).
- 5Read your estimated bond premium on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Performance and payment bond premiums are priced by the surety as a tiered percentage of contract value, with the rate dropping as contract size increases because fixed underwriting costs spread over more premium dollars. Typical published rate schedules run around 1-3% on the first bracket of contract value (often the first $500K-$1M) and step down to under 1% on larger brackets, though your actual rate depends heavily on your company's financial strength, claims history, and relationship with the surety — well-qualified contractors often get rates at the low end of published schedules while newer or marginal credit contractors pay standard or above-standard rates. This calculator applies a simple tiered rate structure to your contract value to estimate premium cost, which you should carry as a distinct line item in your bid rather than folding into general conditions, since it's calculated off total contract value and doesn't scale with duration the way GCs do.
Worked example
Using the values the calculator loads with:
Inputs
- Contract value: 4200000 $
- First bracket ceiling: 1000000 $
- Tier 1 rate: 1.8 %
- Tier 2 rate: 0.85 %
Results
- Estimated bond premium: $45,200.00
- Effective blended rate: 1.08%
- Amount in tier 1 bracket: $1,000,000.00
- Amount in tier 2 bracket: $3,200,000.00
What each field means
Inputs
- Contract value ($)
- The contract value used in the calculation, measured in $. Starts at 4200000 $ so you have a working example on load.
- First bracket ceiling ($)
- The first bracket ceiling used in the calculation, measured in $. Starts at 1000000 $ so you have a working example on load.
- Tier 1 rate (%)
- The tier 1 rate used in the calculation, measured in %. Starts at 1.8 % so you have a working example on load. Accepted range: 0–5 %.
- Tier 2 rate (%)
- The tier 2 rate used in the calculation, measured in %. Starts at 0.85 % so you have a working example on load. Accepted range: 0–5 %.
Results
- Estimated bond premium
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Effective blended rate
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Amount in tier 1 bracket
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Amount in tier 2 bracket
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Is bid bond premium the same as performance bond premium?
The bid bond itself is typically issued at little or no separate cost (often a nominal fee or included in the eventual performance bond premium if you win), since it's a lower-risk guarantee that you'll sign the contract and provide the required performance bond if awarded. The performance and payment bond premium, priced against full contract value, is the real cost carried in your estimate, calculated once you're awarded the job.
Why do bond rates drop at higher contract value tiers?
The surety's underwriting cost — reviewing financials, assessing the contractor, setting terms — is largely fixed regardless of bond size, so it represents a smaller percentage on a larger bond. This tiered structure mirrors how many insurance products price: fixed costs plus variable risk-based costs that don't scale linearly with size.
How much can my specific rate vary from published schedules?
Contractors with strong financial statements, low leverage, and clean claims history can negotiate 10-30% below standard published rates, while contractors requiring additional underwriting scrutiny (thin capitalization, recent losses, or limited track record on similar-sized work) can pay standard rates or a surcharge above them. Always get an actual quote from your bonding agent rather than relying solely on a generic rate table for bid pricing.
Should bond premium be marked up like other direct costs?
Most contractors pass bond premium through at cost without additional markup, treating it as a reimbursable direct cost similar to permits, since owners generally expect to see it itemized transparently on public and larger private bids rather than buried inside a marked-up general conditions line.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
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Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Bid Bond Premium Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/bid-bond-premium
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/bid-bond-premium" target="_blank" rel="noopener">Bid Bond Premium Calculator — RevenueLab</a> (2026).</p>
Source: [Bid Bond Premium Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/bid-bond-premium) (2026).