⚠ Construction Tax Compliance Is High-Risk
Construction companies face IRD scrutiny on long-term contract profit recognition, subcontractor payment withholding, and retention money treatment. Under-withholding on subcontractor payments alone can create significant back-tax liability.
Common Challenges
Long-Term Contract Revenue
When should project revenue be recognised? Percentage of completion vs completed contract methods have dramatically different tax timing implications.
⚠ Risk: Early recognition → provisional tax on incomplete projects
Subcontractor Withholding
Payments to subcontractors who are non-residents or unregistered may be subject to withholding tax under s.20B. Failure to withhold can make the main contractor liable.
⚠ Risk: No withholding → IRD looks to main contractor for tax
Retention Money Timing
Contract retention money held by clients is typically not assessable until released. Incorrect early inclusion inflates taxable profits.
⚠ Risk: Early inclusion → tax paid before cash received
Plant & Equipment Allowances
Construction equipment — cranes, excavators, scaffolding — qualifies for significant capital allowances. Many contractors under-claim these deductions.
⚠ Risk: Under-claiming → significant deduction leakage
Who Is This For?
Main contractors
General contractors and main contractors on residential and commercial projects.
Specialist subcontractors
Electrical, plumbing, HVAC, structural, and fit-out subcontractors.
Civil engineering firms
Road, bridge, tunnelling, and infrastructure contractors.
Property developers
Residential and commercial developers with construction operations.
What We Do
Long-Term Contract Tax Treatment
Establish an IRD-compliant and tax-optimal revenue recognition policy for your construction contracts.
Percentage of completion analysis and WIP assessment
Subcontractor Compliance
Review subcontractor payment processes for withholding tax obligations and ensure all CIS-equivalent obligations are met.
Non-resident subcontractor withholding analysis
Plant & Machinery Allowances
Maximise capital allowances on all construction plant, equipment, and vehicles used in your business.
Including leased and hire-purchase equipment analysis
Construction Profits Tax Return
Prepare BIR51 with accurate project profit schedules, retention money adjustments, and equipment allowance claims.
Multi-project reconciliation and WIP schedules included
How It Works
Contract Portfolio Review
2-3 daysAnalyse active and completed contracts, revenue recognition policies, and subcontractor arrangements.
Compliance Gap Assessment
2-3 daysIdentify withholding tax exposure, incorrect revenue timing, and missed allowances.
Return Filing
5-7 daysPrepare and file profits tax return with project schedules and WIP calculations.
Project Tax Planning
OngoingOngoing advisory for new project bids, subcontractor structures, and equipment procurement timing.
Case Studies
Building contractor — commercial projects, 45 staff
- •Annual project revenue HKD 45M
- •Retention money timing corrected (3 years)
- •Crane and equipment allowances backdated
- •Subcontractor withholding process established
“They uncovered years of over-payment and set up proper processes going forward.”
Specialist fit-out subcontractor — 28 staff
- •Annual revenue HKD 12M
- •Fit-out equipment allowances optimised
- •Revenue recognition policy formalised
- •Staff reimbursement structure reviewed
“Professional service that understood construction accounting. Highly recommended.”
Frequently Asked Questions
Which revenue recognition method is acceptable to the IRD for long-term contracts?
The IRD generally accepts the percentage of completion method for long-term contracts, which recognises revenue based on the proportion of work completed. The completed contract method (recognising all profit on completion) may be acceptable for shorter contracts. The key is consistency and a defensible basis for the completion percentage — typically certified progress, costs incurred, or physical completion.
When does withholding tax apply to subcontractor payments in Hong Kong?
Withholding tax applies under s.20B of the IRO when payments are made to non-resident persons for services rendered in Hong Kong. For construction, this typically affects payments to Mainland Chinese or overseas subcontractors who are not registered for HK profits tax. The main contractor may become the deemed agent of the non-resident and liable for the tax withheld.
How is retention money treated for profits tax purposes?
Retention money is generally not assessable until it becomes legally due and receivable, which is typically when the defects liability period expires and the retention is released. Including retention in income before this point brings tax forward unnecessarily. Ensure your accounting policy matches the tax treatment.
What capital allowances can construction companies claim?
Construction companies can claim: (1) 60% initial allowance + 10-30% annual allowance on construction plant & machinery (excavators, cranes, compressors, power tools); (2) 30% for general plant; (3) Commercial vehicles used in the business; (4) Computer systems and site offices. Scaffolding and temporary works may be treated as revenue expenditure if used and discarded within the year.
Are site overhead costs fully deductible?
Yes, genuine site overhead costs — site management salaries, site office rental, PPE, insurance, and temporary utilities — are deductible business expenses under s.16(1) IRO. Head office overhead allocated to projects should be based on a reasonable and consistent methodology to withstand IRD scrutiny.
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