Choosing the Right Construction Accounting Method: Cash, Accrual, Completed Contract, and Percentage of Completion

Construction Accounting Methods Explained

Construction companies pick from several construction accounting methods to report income. Your choices—cash, accrual, completed contract, or percentage of completion—impacts cash flow, tax timing, and recordkeeping. This post explains each one in clear terms. Use it to talk with your CPA or bonding company.​

Construction Accounting Methods: Cash Method

The cash method works well for small firms. You report income when paid. See IRS cash method rules. You deduct costs when you pay them. A client draw on Friday? Record it that day. Pay a sub next week? Deduct it then.​

Cash and Tax Effects

Slow payers cut your taxes now. Taxes follow real cash in, not job progress. This matches tax bills to your bank balance.​

Downsides

Books can look great one month, bad the next. Payments drive the numbers, not work done. Lenders may get the wrong idea. Tax bill may be higher in certain years depending upon cash paid.​

Records Needed

Keep cash receipt details. Note who paid, amount, and job. Track payments to vendors, subs, and payroll by job code. These help spot project profits.​

Construction Accounting Methods: Accrual Method

Accrual reports income when earned or billed. Record expenses when they happen, even before cash moves. See IRS accrual method rules. Bill concrete in December? Count your revenue when its billed. Client pays in January? It does not matter, the expense has been booked.​

Cash and Tax Effects

It shows true profit per job. Banks and sureties prefer this view. Taxes come on billed work before you collect. Revenue matches work time.​

Downsides

You could potentially report higher taxable income than your cash position would suggest. Recordkeeping is vital. A bookkeeper who knows how to class transactions and code them correctly is not a negotiable here. Having a CPA who knows how to help you plan accordingly is huge piece of your team, and that planning has to happen months in advance.

Records Needed

Log invoices by client and job. Track dates, amounts, and aging. Keep vendor bills, retainage, and payment status. Tie job costs to contracts, phases, and codes. Back up with change orders.​

Construction Accounting Methods: Completed Contract Method

This method waits until a job hits 95% done. Then report most revenue and costs for tax. Long jobs push taxes to the end.​ See IRS Treasury Reg § 1.460-3.

Cash and Tax Effects

Less tax during the job. Billings build cash without tax hits. But expect a big tax bill at finish. Use accrual for books, this for taxes. Track the gaps.​

Downsides

You could potentially have a very large tax bill in certain years. This is when planning and the quality of your CPA come in to shine. A good CPA who understands your business will know what projects are likely to be reported in the upcoming tax year, and can help you make better decisions to help defer tax liability through timely asset acquisitions, loss recognition, and making appropriate estimated payments so you don't get hit with a tax bill that makes your head spin.

Records Needed

Build job schedules. List contract price and changes. Track estimated and real costs. Note billings and cash in. Define "complete" clearly for IRS rules.​

Construction Accounting Methods: Percentage of Completion Method

Report revenue as work goes on. Figure percent done: costs so far divided by total costs. Apply that to contract price.​ See Treasury Reg §1.460-3. This is method is required if you exceed the IRS's gross receipts test.

Cash and Tax Effects

Income ties to work done. Good for big or long jobs. Taxes hit as profit builds, even on open work. Strong estimates prevent surprises.​

Lookback method must be used on over/underreported profitability on jobs. Also you are required to prepare an alternative minimum tax, AMT, adjustment. This could affect your tax situation significantly.

Downsides

This is the most complex and least tax friendly method to use, but you may be required to use it (gross receipts test). You need a CPA who knows how all these items are related and how they affect each other. Your bookkeeper similarly must be excellent at coding and recording transactions correctly so you have the most accurate projections to work from with your CPA during planning. Remember planning is not an option, it is a must if you want to ensure compliance and maximum tax savings. A qualified CPA is a tool you must have in your bag.

Records Needed

Log costs by job and code. Update total cost estimates often. Document contracts and changes. Show percent complete, revenue, costs, profit. Compare billings to earned revenue.​

Pick the Right Construction Accounting Method

• Cash: Simple for small teams. Saves tax but hides true profits.

• Accrual: Clear profit view. Meets GAAP. Speeds up taxes.

• Completed Contract: Defers tax on long jobs. Needs book-tax tracking.

• Percentage: Tracks ongoing profits well. Demands tight controls.​

  
  

Pick based on your size, jobs, bonds, and goals. Cartwright CPA Tax & Wealth Advisory LLC helps choose and set up methods. We build job-cost systems too. Schedule a free consultation for a review.