Determine completion from the actual project facts
A contractor using a valid completed-contract method needs a year-end completion review that reaches beyond the job-status label. The tax completion rule in section 1.460-1 looks to the earlier of final completion and acceptance or customer use for the intended purpose, other than testing, together with at least 95 percent of total allocable contract costs incurred. Waiting for an internal closeout code can therefore defer income beyond the permitted year.
Begin with the assumption that eligibility for the completed-contract method has already been established. This guide addresses the completion event, not permission to choose that method. Give the project manager, controller, and tax preparer one shared timeline showing actual customer use, acceptance communications, remaining obligations, and costs incurred. A project can remain operationally open after reaching tax completion.
Test customer use and the cost threshold together
Assume an eligible contract began in a prior year and has a fixed $1 million gross contract price. By December, the contractor has incurred $920,000 of allocable costs, and its supported total cost estimate is $950,000. The customer has begun using the entire contracted facility for its intended operations. Remaining work consists of minor corrections expected to cost $30,000. Assume these corrections are not separately priced secondary items and there is no price dispute.
The incurred-cost ratio is approximately 96.84 percent: $920,000 divided by $950,000. With intended customer use established, the assumed contract reaches tax completion in December even if the final correction visit occurs in January. Under the completed-contract rule, the example recognizes $1 million of gross contract price and $920,000 of incurred allocable costs in the completion year, producing $80,000 of income before other adjustments.
At a stipulated 21 percent federal rate with no other limitation or offset, that income requires a $16,800 tax reserve. The remaining expected $30,000 is a cash forecast, not an automatic completion-year deduction. Costs incurred after completion follow a permissible accounting method. The business must track the later expenditures rather than both deducting an estimate now and deducting the same invoices again when paid or incurred.
Do not substitute billing or testing for completion evidence
Suppose instead the customer is only testing the facility, or substantial required work leaves incurred costs below 95 percent. The customer-use branch has not been established merely because an invoice describes the job as substantially complete. The separate final-completion-and-acceptance branch still needs review. Conversely, failure to collect the final invoice does not establish that the contract remains incomplete.
Under section 1.460-4, gross contract price for completed-contract reporting includes retainage and holdbacks to which the contractor is entitled by law or contract, even when not yet due or paid. In the example, assume $50,000 of the fixed price remains ordinary retainage. Excluding that receivable would improperly reduce the illustrated income to $30,000 and understate the stipulated tax reserve by $10,500. A genuine dispute calls for separate analysis under the regulation's disputed-claim rules.
Identify incomplete secondary items separately. The regulations can require allocation of the associated price and costs while treating the primary subject matter as completed. Do not make that allocation from a last-minute percentage selected to minimize tax. Ask what the customer contracted to receive, whether the remaining item is genuinely secondary, and what support exists for its price and cost assignment.
Build a completion file that survives staff turnover
Retain the executed scope, customer occupancy or operational-use evidence, acceptance certificates, testing logs, dated punch lists, incurred-cost ledger, and the remaining-cost estimate. Explain major revisions in the denominator, including newly discovered work or omitted subcontractor obligations. Vendor deposits, open purchase orders, and costs incurred for tax purposes are not interchangeable categories. Resolve these differences before signing the year-end completion memorandum.
Assign an owner to reconcile the completion memorandum to revenue reporting, deferred contract costs, retainage, and later correction invoices. The memorandum should state the decisive date and rule, the facts supporting intended use or final acceptance, and unresolved issues requiring further evaluation. Keep financial-statement completion judgments visible without assuming they control federal tax treatment.
Apply this review consistently across similarly classified contracts. Contractual disputes, separate delivery units, related-party activity, and state tax differences can change the analysis. Deliberately postponing an acceptance document principally to defer federal income tax does not establish a later completion year. A defensible reserve follows the actual contract and documented performance rather than the date that produces the most convenient payment calendar.
Sources & further reading
Consult the original guidance and its effective dates. These references support the educational discussion; their application depends on the specific facts.