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openaccountants/skills/construction-sector.md

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1---
2name: construction-sector
3description: >
4 Use this skill whenever a construction contractor, subcontractor, developer, or design-build firm asks about sector-specific tax / accounting. Trigger on phrases like "construction industry scheme", "CIS", "CIS deduction", "reverse charge construction VAT", "domestic reverse charge construction services", "developer's relief", "long-term contract", "percentage of completion", "completed contract", "ASC 606 construction", "uninstalled materials", "retention", "subcontractor 1099", "USDOL prevailing wage", "Davis-Bacon", "construction VAT zero-rate new residential", or any construction-sector tax question. Covers UK Construction Industry Scheme (CIS), UK domestic reverse charge VAT for construction services (effective 1 March 2021), US construction tax (long-term contracts under IRC §460; percentage-of-completion-capitalisable; small contractor exception), EU developer reliefs and new-build zero/reduced VAT rates, retentions and progress billing accounting. Does NOT cover: construction safety regulation, building permit procedures, or technical engineering standards.
5version: 0.1
6jurisdiction: GLOBAL
7category: vertical
8depends_on:
9 - corporate-income-tax-workflow-base
10verified_by: pending
11---
12 
13# Construction Sector Tax & Accounting v0.1
14 
15## What this file is
16 
17A sector overlay for construction contractors, subcontractors, developers, and design-build firms.
18 
19---
20 
21## Section 1 — Revenue recognition for long-term contracts
22 
23### 1.1 IFRS 15 / ASC 606
24 
25**[T1] Performance obligation satisfied over time** if any of:
26- Customer simultaneously receives and consumes the benefits (typically for routine services)
27- Work creates or enhances an asset the customer controls
28- No alternative use to seller + enforceable right to payment for work performed to date
29 
30**[T1] Input method** (proportion of costs incurred to total expected costs) — most common for construction.
31**Output method** (units produced / milestones / surveys) — used where measurable units.
32 
33**[T1] Uninstalled materials** — exclude from cost-to-cost calculation to avoid overstating progress (IFRS 15 IE19 example).
34 
35### 1.2 US tax — long-term contracts (IRC §460)
36 
37**[T1]** A "long-term contract" is one not completed within the tax year started.
38 
39**[T1] Percentage of Completion Method (PCM)** — required for most contracts; based on cost-to-cost.
40 
41**[T1] Small Contractor Exception** — exempt from PCM if:
42- Average annual gross receipts ≤ USD 30m (2025; indexed)
43- Contract estimated to complete within 2 years
44 
45Small contractor may use Completed Contract Method (CCM) or Cash method for short-duration contracts.
46 
47**[T1] Home Construction Contract Exception** — residential construction not required to use PCM.
48 
49### 1.3 Look-back interest (US)
50 
51**[T1] §460(b)(2)**: at completion of long-term contract, recompute PCM based on actual rather than estimated costs; if difference creates over- or under-payment, interest computed.
52 
53---
54 
55## Section 2 — UK Construction Industry Scheme (CIS)
56 
57**[T1]** A withholding regime for payments by contractors to subcontractors in construction operations.
58 
59### 2.1 Contractor obligations
60 
61- Verify subcontractor with HMRC
62- Withhold and remit to HMRC based on subcontractor status:
63 - **Gross payment status** — 0% deduction
64 - **Registered subcontractor** — 20% deduction
65 - **Unregistered subcontractor** — 30% deduction
66- Monthly CIS return (CIS300) by 19th of month
67- Payment of CIS deducted by 22nd (electronic) / 19th (cheque)
68 
69### 2.2 Subcontractor
70 
71- Register as contractor (if employs other subbies)
72- Apply for gross payment status if turnover ≥ GBP 30k per individual / GBP 30k per partner / GBP 200k per company
73- Recover CIS deductions against own tax liability
74 
75### 2.3 Scope
76 
77**[T1]** "Construction operations" include site preparation, demolition, installation, building, painting/decorating, alteration. Excludes architecture, engineering, surveying.
78 
79**[T1] Mixed contracts** — full CIS applies unless the construction element is incidental and minor.
80 
81---
82 
83## Section 3 — UK Domestic Reverse Charge for Construction VAT
84 
85**[T1] Effective 1 March 2021** — domestic reverse charge applies to most construction services in the UK construction supply chain (subject to certain exceptions for end-user / intermediary supplier).
86 
87### 3.1 Mechanics
88 
89- Supplier issues invoice **without VAT** (notation: "reverse charge applies; customer pays VAT directly")
90- Customer accounts for output VAT on their return AND recovers as input VAT (subject to standard rules)
91- Net cash effect: nil for customer
92- Disadvantages: smaller supplier cash flow worsens (no VAT on receipts)
93 
94### 3.2 Scope
95 
96**[T1]** Same as CIS for "construction services" between VAT-registered parties — supplier must charge reverse charge to other contractors. Excludes:
97- Supplies to "end-users" (the final customer in the chain — typically the developer or building owner)
98- Supplies to "intermediary suppliers" (those who acquire and on-supply construction services to end-users)
99 
100### 3.3 End-user / intermediary supplier notification
101 
102End-user / intermediary must notify supplier in writing; failure to notify means supplier should charge VAT normally.
103 
104---
105 
106## Section 4 — Construction VAT
107 
108### 4.1 New-build residential
109 
110**[T1]**
111- **UK**: Zero-rated (Item 2(a) Group 5 Schedule 8 VATA)
112- **France**: Reduced rate 5.5% for social housing (HLM); 10% for certain renovations
113- **Germany**: Standard 19% on most; some construction services in residential sector exempt
114- **Italy**: 4% on first-home purchase; 10% on non-first-home new build
115- **Spain**: Reduced 10% on new residential
116 
117### 4.2 Renovation
118 
119**[T1]**
120- **UK**: Reduced rate 5% for certain residential renovation (over-2-years empty; energy-saving materials)
121- **EU**: Reduced rates per Annex III PVD allowed
122 
123### 4.3 Land
124 
125**[T1]** Most jurisdictions exempt sale of unimproved land. UK option to tax permitted for commercial land.
126 
127---
128 
129## Section 5 — Retention and progress billing
130 
131### 5.1 Retention
132 
133**[T1]** Construction contracts typically retain 5-10% of each progress payment for defects liability period. Accounting:
134- Contract asset (under IFRS 15 / ASC 606) for amount earned but not billed
135- Retention receivable recognised when retention released
136- Bad debt provision for retention if collection uncertain
137 
138### 5.2 Progress billing
139 
140**[T1]**
141- Issue progress invoice based on completion
142- Recognise revenue on % completion (not invoice timing)
143- Variance between billed amount and earned revenue → contract asset (earned > billed) or contract liability (billed > earned)
144 
145---
146 
147## Section 6 — Subcontractor classification
148 
149**[T1] Employment vs self-employed status** — material in construction:
150- US: §530 relief; misclassification penalties; specific Department of Labor (Davis-Bacon) prevailing wage requirements on federal contracts
151- UK: IR35 test for personal service companies; off-payroll worker rules
152- Many jurisdictions: "deemed employment" tests for construction subcontractors
153 
154---
155 
156## Section 7 — Reviewer brief
157 
158```
1591. Contract register — every active project
1602. Revenue recognition — PCM input method calculation per contract
1613. Uninstalled materials exclusion documented
1624. CIS register (UK) — subcontractor list with status, deductions, monthly returns
1635. Domestic reverse charge VAT (UK) — supply chain map, end-user notifications
1646. New-build VAT zero/reduced rate claim support
1657. Contract assets / liabilities reconciliation
1668. Retention schedule by project / customer
1679. Long-term contract look-back interest (US)
16810. Subcontractor employment status assessments
16911. Reviewer questions — [T2]/[T3] items
170```
171 
172---
173 
174## Section 8 — Self-checks
175 
176- [ ] Long-term contracts on PCM input cost-to-cost
177- [ ] Uninstalled materials excluded from cost-to-cost
178- [ ] Small contractor exception applied where eligible (US)
179- [ ] CIS subcontractor verification current (UK)
180- [ ] CIS return CIS300 filed monthly
181- [ ] Domestic reverse charge applied where required (UK)
182- [ ] End-user notification documented (UK)
183- [ ] New-build zero/reduced rate VAT supported with HMRC notice/EU PVD reference
184- [ ] Retention receivable recognised when contractually due
185- [ ] Look-back interest computed at contract completion (US)
186- [ ] Subcontractor employment status documented (IR35 / §530 / Davis-Bacon)
187- [ ] Output flags every [T2]/[T3] item for reviewer judgement
188 
189---
190 
191## Section 9 — Disclaimer
192 
193Construction sector taxation is highly fact-specific. Outputs must be reviewed by credentialed construction sector practitioners. The most up-to-date version is at [openaccountants.com](https://openaccountants.com).
194 

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Use this skill whenever a construction contractor, subcontractor, developer, or design-build firm asks about sector-specific tax / accounting. Trigger on phrases like "construction industry scheme", "CIS", "CIS deduction", "reverse charge construction VAT", "domestic reverse charge construction services", "developer's relief", "long-term contract", "percentage of completion", "completed contract", "ASC 606 construction", "uninstalled materials", "retention", "subcontractor 1099", "USDOL prevailing wage", "Davis-Bacon", "construction VAT zero-rate new residential", or any construction-sector tax question. Covers UK Construction Industry Scheme (CIS), UK domestic reverse charge VAT for construction services (effective 1 March 2021), US construction tax (long-term contracts under IRC §460; percentage-of-completion-capitalisable; small contractor exception), EU developer reliefs and new-build zero/reduced VAT rates, retentions and progress billing accounting. Does NOT cover: construction safety regulation, building permit procedures, or technical engineering standards.

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