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How to Calculate Your Working Capital Costs Per Project

Read time: 2 minutes
Published: February 11, 2025
Last updated: February 21, 2025

Nobody necessarily likes the idea of increasing their bid to account for the cost of capital– some subcontractors might believe a lean bid is more likely to win them work. But as Josh Luebker, construction consultant and fractional CFO, says, your bid coming in high isn’t necessarily a bad thing. It may mean your bid is one of the most comprehensive, and that your competition may have scope gaps, potentially undervaluing their services and likely losing money on the project. And the fact is, without adding the cost of capital to your bids, you’re vulnerable to profit erosion from even modest increases in DSO, which affect your financing costs. 

In this video, Josh Luebker introduces a powerful calculator designed to help you determine the percentage to add to your bids to offset the hidden costs of capital that come from financing labor, materials, and lost opportunities. This calculator focuses on the cost of capital per project, allowing you to get specific for each bid.

These calculations will help you determine the ideal percentage to add to bids to offset working capital costs. They can also potentially identify if you’re losing money or even paying to work on projects.

To use it correctly, you need to start by inputting project-specific DSO for various clients on the first tab and then add information on each of your working capital options to help you understand the related costs. 

You’ll need to come prepared with: 

  • Lender interest rates
  • Credit card interest rates
  • Bank line of credit interest rates

To get started, download the calculator and follow along with Luebker in the video. 

Download the Calculator Here

Ensure all your data is correct as you plug it into the calculator. Accurate figures are integral to the utility of the calculations. Then follow the instructions Josh covers in the video below.

Once you finish your calculations, Luebker recommends that you price out 3 more working capital options to add to your capabilities and request an increase to one of your existing credit limits.

To learn more about accounting for the cost of your working capital and how to include that in your bids, watch our full Meetup on demand

About Billd: At Billd, we provide a payment solution that enables commercial construction contractors to free up cash for material purchases while enjoying the flexibility of 120-day payment terms. You get financing for commercial materials upfront with the freedom to pay it back at your own pace. Learn more about how we can help eliminate your company’s cash-flow problems so you can win more bids and grow your business.

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FAQs

Why should subcontractors increase their bid to account for the cost of capital?

Accounting for the cost of capital in their bid ensures a more comprehensive and accurate proposal. It helps protect against profit erosion due to increased Days Sales Outstanding (DSO) and associated financing costs.

What information do subcontractors need to use the calculator mentioned in the blog?

Subcontractors will need project-specific DSO for various clients, lender interest rates, credit card interest rates, and bank line of credit interest rates.

What should subcontractors do after using the calculator?

After completing their calculations, it's recommended that subcontractors price out 3 additional working capital options to expand their capabilities and request an increase to one of their existing credit limits.

Travis Mayor

Travis is the Director of Strategic Partnerships at Billd. He thrives in guiding subcontractors through the intricate landscape of financial management, offering tailored solutions to enhance cash flow efficiency and maximize profitability. His mission is to empower commercial subcontractors with the knowledge, tools, and resources they need to thrive in today's dynamic business landscape.

Are you ready to unlock more working capital for your business?

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