Closing the Books for Contractors and Subcontractors

A trading business recognizes revenue the moment goods are handed over, but a construction contract spans multiple accounting periods and is billed in stages tied to progress. Accounting standards therefore call for the percentage-of-completion method to recognize revenue along the way rather than waiting for full project handover. The catch is that measuring progress depends on data from site engineers who are not accountants, so the figures that arrive are often a visual estimate rather than a measurement grounded in actual costs incurred. The accounting function has to build a routine where the construction team reports cumulative cost against the total project estimate at least every month-end, so the completion ratio is calculated consistently rather than guessed by each foreman using a different personal standard. Left unchecked, every project ends up using its own estimation habit, the consolidated statement loses internal consistency, and the auditor flags the same observation year after year.

Retention money is another feature that sets construction accounting apart from ordinary business. Project owners commonly withhold five to ten percent of every payment, releasing it only after the defect liability period ends, which can run one to two years past handover. That sum is technically an asset but is not liquidity available on demand, and if the books fail to separate it from ordinary trade receivables the average collection period banks rely on for credit decisions becomes distorted, since retention carries no due date comparable to a normal invoice. Many project owners also accept a bank guarantee instead of a cash holdback, which means the contractor pays issuance fees and posts collateral or a pledged deposit with the issuing bank. That commitment belongs in the financial statement notes too, or a reader of the statement never sees the full extent of exposure tied up with the bank.

The three percent withholding requirement on hire-of-work payments is a rule general contractors frequently skip when paying small subcontracting crews, especially unregistered labor teams. Cash paid on site without an issued withholding certificate exposes both parties: the payer risks an additional tax assessment for failing to remit withholding on schedule, while the subcontractor has no proof of income when filing an annual personal tax return. A durable fix is writing into every subcontract that each payment must run through the withholding process and produce a certificate before funds move, regardless of whether payment is cash or bank transfer. Once that discipline exists from project start, the accounting team can compile figures and file PND 3 or PND 53 on time every month instead of chasing missing paperwork at year-end.

Material and labor spending at the job site is the weakest link most often found when closing construction books, because some purchases happen spontaneously just to keep work moving. Many local shops near a site are not VAT-registered and can issue only a plain delivery slip. Once a full project's costs are totaled, the share of spending lacking a proper tax invoice can exceed what the Revenue Department will accept without explanation. A workable fix sets a spending threshold for site purchases that must go through a pre-approved purchase order, backed by a roster of regular vendors capable of issuing tax invoices, while unavoidable small purchases use the self-certifying receipt format the Revenue Department permits when no vendor can issue an invoice. This cuts disallowed expenses and lets project cost figures reflect reality more closely.

Depreciation on construction machinery and equipment is another item contractors frequently miscalculate, since heavy machinery such as a backhoe or concrete mixer often serves several projects at once. Allocating depreciation to each project needs a clear basis, such as actual hours logged or the duration the equipment stayed on that particular site. Without a defined basis, allocation drifts toward guesswork, per-project cost stops reflecting reality, and it directly distorts the completion ratio because cumulative cost is wrong. Equipment rented temporarily also needs recording as a rental expense rather than a fixed asset, or both the balance sheet and the corporate tax computation for non-deductible depreciation end up affected.

The timing for remitting VAT on construction work is tied to the billing date or the payment date, whichever occurs first, not the date physical progress happens to match recognized accounting revenue. That gap between the two triggers regularly confuses bookkeepers unfamiliar with construction, because accounting revenue and the amount subject to VAT can fall in different months. The safer approach keeps two separate reconciliation columns every month: one tracking percentage-of-completion revenue for closing the financial statement, the other tracking the value that must appear on a tax invoice tied to the actual billing schedule for filing PP30. Keeping the two systems clearly apart keeps the accounting team from missing a filing deadline or mixing figures between columns and having to amend a return later.

Staged delivery also creates a gap between the amount billed and the amount actually recognized as revenue, known in the trade as overbilling or underbilling relative to the contract. When billing runs ahead of recognized revenue, the difference belongs on the books as unearned income, not immediate revenue, since that portion of work has not truly been delivered yet. Conversely, when completed work outpaces what has been billed, the difference belongs as an unbilled receivable asset. Both items are commonly overlooked in mid-sized contractor statements that lack a dedicated project cost accounting system, leaving the balance sheet showing receivables and liabilities that do not match each project's actual position, and the auditor typically ends up posting several correcting entries once a review begins.

Pulling every strand together, closing a contractor's books demands closer cooperation between the field construction team and the accounting office than an ordinary business requires, because nearly every key figure originates from field data rather than accounting documents directly, from physical progress and retention value to bank guarantees and machine hours logged. A company that builds a routine of consistent monthly site-to-accounting reporting closes on schedule and has answers ready the moment an auditor asks. A company that lets each side work in isolation typically loses time chasing paperwork at year-end and may need to file amended tax returns after errors surface. Investing in the system from the start of a project pays off far more than fixing the mess once it is too late.