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Zero-Balance Account
What is a Zero-Balance Account?
A zero-balance account (ZBA) is a financial tool commonly used in construction accounting where the account balance is maintained at or near zero. Funds are transferred to the ZBA as needed to cover expenses or payments, typically from a parent account. Once a transaction has been made from the ZBA, that amount spent is automatically transferred from the parent account, so the ZBA balance returns to zero.
In the complex world of construction projects—where multiple subcontractors are involved—ZBAs allow the general contractor (GC) to closely monitor and manage cash flow for each subcontractor on the project. This system prevents excess funds from sitting idle in numerous accounts—and potentially forgotten as the project progresses. It also provides a clear audit trail for each subcontractor’s expenses, making it easier to track costs against budgets to identify any discrepancies or unusual spending patterns. Additionally, ZBAs can help reduce the risk of fraud or unauthorized spending, as funds are only transferred on an as-needed basis.
ZBAs provide a level of control and visibility that is crucial for maintaining liquidity and profitability—much like Siteline. Siteline allows subcontractors to easily track their inflows and outflows, providing a clear financial picture of each project and the company overall. Interested in learning more? Schedule your personalized Siteline demo here.
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Other construction terms
What is Billings in Excess of Costs?
Billings in excess of costs (also called overbillings) occur when you’ve invoiced your client for more work than you’ve actually completed or incurred costs for. In other words, it represents getting paid ahead of your work schedule.
Here’s how it works: If you’re a concrete subcontractor on a $100,000 job and you bill 50% upfront ($50,000) but have only completed $30,000 worth of work, that $20,000 difference is your billings in excess of costs. You owe your client that work, and until you complete it, that $20,000 remains as a liability on your balance sheet.
For subcontractors, understanding billing in excess of costs is essential because it can be a strategic cash flow tool when used carefully. For example, when bidding on a job, you can be smart about how you structure your schedule of values (SOV)—breaking work down into more detailed line items that allow earlier billing. However, this strategy requires regular monitoring to ensure:
- Your billing somewhat aligns with your actual percentage complete, and
- The remaining contract value will still cover your remaining costs.
The biggest risk of overbilling is thinking your margins look better than they are, simply because you’re collecting cash faster. Surety companies and lenders also scrutinize overbillings closely, as excessive amounts can signal poor project management or potential cash flow problems down the road.
With Siteline, you can easily track whether you’re billing in excess of your costs by pulling your month-to-month incurred costs and comparing them against your billing progress. This real-time visibility helps ensure you’re billing appropriately while maintaining realistic profitability expectations. If you’re interested in seeing for yourself, schedule a personalized demo of Siteline here.
What is an Unconditional Lien Waiver?
An Unconditional Lien Waiver in the construction industry is a signed document from a contractor, subcontractor, materials supplier, laborer, or other party involved in a construction project, which gives up their right to place a lien on the property unconditionally, typically after they have received full or partial payment for their work or materials. It serves as a guarantee to the property owner that they will not face a lien, or legal claim against their property, for this party's unpaid work or supplies, regardless of whether the party is subsequently paid in full or not.
What is Underbilling?
Underbilling refers to a scenario in the construction industry where the actual costs incurred on a project surpass the billed amount for a specific time period. Often occurring unintentionally due to unexpected cost variations, it results in a deficit situation for the contractor. It is essentially an imbalance where the contractor has delivered more work or materials than they have billed the client for. Underbilling can strain cash flow and disrupt project schedules if not addressed promptly. While this might prove beneficial to the client in the short term, contractors need to ensure that they identify and rectify underbilling to maintain project profitability and financial stability.
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