# Construction ERP software in the UAE: job costing, subcontractors and retention

> What construction ERP software must do for UAE contractors: job costing by cost code, subcontract valuations, retention and its VAT, site labour rules, e-invoicing from 2027 and a retention calculator.

- Page: https://oxedge.com/insights/construction-erp-software-uae/
- Markdown: https://oxedge.com/insights/construction-erp-software-uae.md
- Language: en-AE
- Type: Insight (article)
- Published: 2026-11-06
- Author: Haris Qarni, Founder & Director (https://oxedge.com/about/haris-qarni/)
- Category: CRM & ERP
- Publisher: OXEDGE (Oxedge FZE LLC), digital agency in Dubai, UAE: https://oxedge.com/
- Contact: info@oxedge.com · WhatsApp +971 50 815 3521 · https://oxedge.com/contact/

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**Quick answer:** A construction ERP for a UAE contractor has to cost every job by cost code, run subcontract packages and monthly valuations, and track retention as its own balance: commonly 10 per cent of each certificate, with half released at taking-over. It must also bill 5 per cent VAT and send e-invoices from 2027.

Construction ERP software in the UAE is judged on three things a trading company never faces. Can it show, on any day, what each job has cost against budget? Can it run fifty subcontractors on back-to-back terms without a spreadsheet? And does it know exactly how much retention you hold, and how much is held from you, on every contract? This guide covers how each should work, the UAE rules behind them and how to compare systems, with a retention calculator.

**Key takeaways**

- Job costing only works if every purchase order, subcontract, timesheet and invoice carries the job and a cost code from day one.
- Retention is a contract term, not a statutory rule, so the system has to read the rate, cap and release dates from each contract.
- The new Civil Transactions Law took effect on 1 June 2026 and keeps the contractor's ten-year liability for structural defects.
- [E-invoicing](https://oxedge.com/e-invoicing-uae/) goes live on 1 January 2027 for businesses above AED 50 million in revenue and on 1 July 2027 for the rest.

**11.1%**: Growth of the UAE construction sector in 2025, the fastest of any sector

**12.9%**: Construction's share of UAE non-oil GDP in 2025

**10%**: Most common retention on each certificate, capped at 10 per cent of the contract price

**10 years**: Contractor and engineer liability for collapse or structural defects after completion

Sources: [Gulf News, FCSC figures for 2025 (30 May 2026)](https://gulfnews.com/amp/story/uae%2Fgovernment%2Fuae-economy-expands-62-with-gdp-rising-to-dh19-trillion-in-2025-1.500557786) · [Neo Legal, retention money](https://neolegal.ae/what-is/retention-money) · [Kayrouz and Associates, decennial liability under the 2026 Civil Code](https://www.kayrouzandassociates.com/insights/decennial-liability-uae-construction-2026-civil-code). Checked 20 October 2026.

## What a construction ERP must do that a general ERP doesn't

![White hard hat on rolled blueprints beside a tape measure, showing what a construction ERP must do that a general ERP does not.](https://oxedge.com/wp-content/uploads/2026/11/construction-erp-software-uae-s1.jpg)

A contractor wins a lump sum, spends it over two years through dozens of suppliers and subcontractors, bills monthly against measured progress, and learns the true margin only at final account. The ERP has to follow that shape.

| Module | What it does | What to check in the UAE |
| --- | --- | --- |
| Jobs and budgets | One record per project with a budget by cost code | Budgets in AED with variations added, not overwritten |
| Commitments | Orders and subcontracts counted before invoices arrive | Committed cost per code, visible on site |
| Subcontract packages | Scope, rates, valuations, retention and back charges | Back-to-back terms that mirror the main contract |
| Progress billing | Interim valuations, certificates and invoices to the client | Retention deducted and VAT at 5 per cent |
| Site labour | Timesheets, crews, overtime and labour cost per job | Midday break hours in summer and wages paid through WPS |
| Document control | Drawings, RFIs and variations | Each variation linked to its cost and claim |

Skip commitments and the cost report shows only invoices received, so a job looks healthy until subcontractor bills arrive months later.

## Job costing: budgets, cost codes and committed cost

![Brick wall built from courses of different sizes with a trowel and level on top, showing job costing with budgets and cost codes.](https://oxedge.com/wp-content/uploads/2026/11/construction-erp-software-uae-s2.jpg)

Good job costing rests on one rule: nothing gets spent without a job and a cost code. Each trade or cost type gets a code and budget, and the system reports budget, committed, actual and forecast for each.

[Odoo](https://oxedge.com/odoo-erp-dubai/) does this with analytic accounting, where analytic plans can hold projects in one plan and cost categories in another; Business Central uses projects with budget lines.

Sources: [Odoo 19 documentation, analytic accounting](https://www.odoo.com/documentation/19.0/applications/finance/accounting/reporting/analytic_accounting.html) · [Microsoft Learn, WIP methods for projects (7 April 2026)](https://learn.microsoft.com/en-us/dynamics365/business-central/projects-understanding-wip)

Revenue recognition matters as much as cost. Business Central ships five work in process methods, including Percentage of Completion, where completion is actual cost divided by budgeted cost and recognised revenue is the contract value times that percentage, and Completed Contract, which recognises nothing until the project closes. Your auditor, not the software, decides which method fits.

Source: [Microsoft Learn, WIP methods for calculating and recording project progress](https://learn.microsoft.com/en-us/dynamics365/business-central/projects-understanding-wip)

## Subcontractors: packages, valuations and back-to-back terms

A main contractor is largely a manager of subcontracts, so this module carries the most money. Each package needs scope, price, payment terms, retention, advance payment and back charges held as a contract in the system, not a PDF in email.

| Stage | What happens | What the ERP should hold |
| --- | --- | --- |
| Package award | Scope, price and terms agreed | Value committed against the cost code |
| Monthly valuation | Subcontractor applies; QS measures and agrees | Gross to date, previous and this period |
| Deductions | Retention, advance recovery, back charges | Each deduction as its own line with a running balance |
| Variations | Instructed changes priced and agreed | Link to the client variation, so it's claimed upstream |
| Final account | Scope closed, retention released later | Retention due dates tied to handover and defects periods |

Variations are where money leaks. If a subcontractor's variation is approved on site but nobody claims it from the client, the cost lands with no revenue. A system that won't close a subcontract variation until it's linked to a client variation, or marked as your own cost, prevents that.

> If a subcontractor's variation is approved on site but nobody claims it from the client, the cost lands with no revenue.

Commentary on the new Civil Transactions Law notes that the strict decennial warranty doesn't cover the main contractor's recourse claims against subcontractors, so those belong in the subcontracts. Store each subcontract's defects and warranty terms where your team can find them years later.

Sources: [Legal 500, Awatif Mohammad Shoqi Advocates, 2026 Civil Transactions Law and construction (16 June 2026)](https://www.legal500.com/developments/thought-leadership/uae-construction-contracts-key-changes-dispute-risks-under-the-2026-civil-transactions-law/) · [Kayrouz and Associates, decennial liability](https://www.kayrouzandassociates.com/insights/decennial-liability-uae-construction-2026-civil-code)

## Retention: holding it, releasing it and the VAT on it

![Padlocked strongbox on a scaffold with a key hanging from a crane hook, showing retention held back until a UAE construction job finishes.](https://oxedge.com/wp-content/uploads/2026/11/construction-erp-software-uae-s3.jpg)

Retention is the share of each payment held back as security for defects. UAE law doesn't require it; the contract sets it. Galadari Law describes 10 per cent of the contract price as typical, half released on completion and half when the defects liability period ends, usually a year after handover. Neo Legal describes 10 per cent of each certificate capped at 10 per cent of the contract price as most common, with 5 per cent caps on larger contracts, and subcontracts often mirror the main contract.

Sources: [Galadari Law, retention in UAE construction contracts](https://galadarilaw.com/?p=8688) · [Neo Legal, retention money](https://neolegal.ae/what-is/retention-money)

So the ERP must store rate, cap and release triggers per contract, in two ledgers that never mix: retention you hold from subcontractors, and retention clients hold from you. Neo Legal notes that cash retention isn't held on trust, so if the holder becomes insolvent the payee is an unsecured creditor; a retention bond moves that risk to a bank.

Source: [Neo Legal, retention money](https://neolegal.ae/what-is/retention-money)

VAT adds a timing question. Construction services are standard-rated at 5 per cent, and Farahat and Co explains that VAT doesn't apply when retention is withheld; it becomes due when the retention is released or invoiced. The system should flag retention due for release so the invoice and its VAT go out together.

Sources: [Farahat and Co, UAE VAT on construction services (12 August 2026)](https://farahatco.com/blog/uae-vat-on-construction-services/) · [Ministry of Finance, VAT](https://mof.gov.ae/en/public-finance/tax/vat/)

**The rules:** Federal Decree-Law No. 25 of 2025, the new Civil Transactions Law, took effect on 1 June 2026 and replaced Federal Law No. 5 of 1985. Its decennial liability rules, in Articles 821 to 824, keep the contractor and supervising engineer jointly liable for ten years for collapse and for defects that threaten a building's stability or safety, and that liability can't be excluded by contract. Contracts concluded before 1 June 2026 generally stay under the 1985 law, whose Articles 880 and 882 set the same rule. VAT has applied at 5 per cent since 1 January 2018. This is general guidance, not legal or tax advice.

Sources: [Legal 500, 2026 Civil Transactions Law and construction](https://www.legal500.com/developments/thought-leadership/uae-construction-contracts-key-changes-dispute-risks-under-the-2026-civil-transactions-law/) · [Neo Legal, new UAE Civil Code and construction (July 2026)](https://neolegal.ae/insights/new-uae-civil-code-construction-2026) · [Kayrouz and Associates, decennial liability](https://www.kayrouzandassociates.com/insights/decennial-liability-uae-construction-2026-civil-code) · [Fenwick Elliott on Mondaq, Articles 880 and 882 (14 November 2013)](https://www.mondaq.com/real-estate/272284/limitations-on-liability-in-the-uae-beware) · [Ministry of Finance, VAT](https://mof.gov.ae/en/public-finance/tax/vat/)

The calculator shows one job's retention, net invoice and billing position.

Need to track every contract? [Download the free retention tracker (Excel)](https://oxedge.com/wp-content/uploads/downloads/oxedge-construction-retention-tracker.xlsx). It keeps retention you hold and retention held from you apart, and works out balances and release dates.

Illustration only, not accounting or tax advice. Retention is the lower of the rate times value certified and the cap times the contract value. Completion and earned revenue follow the Percentage of Completion formula in [Microsoft's WIP documentation](https://learn.microsoft.com/en-us/dynamics365/business-central/projects-understanding-wip); VAT on retention is left for its release, as described by [Farahat and Co](https://farahatco.com/blog/uae-vat-on-construction-services/).

## Site labour, timesheets and payroll rules

![Rows of hard hats outside a site cabin with workers walking to the site, showing labour, timesheets and payroll on UAE construction jobs.](https://oxedge.com/wp-content/uploads/2026/11/construction-erp-software-uae-s4.jpg)

Labour is often recorded on paper at the gate and costed weeks later. Timesheets captured on a phone by the foreman, against job and cost code, make it a daily number. Two UAE rules shape how those hours are planned and paid.

The first is the summer midday break. The Ministry of Human Resources and Emiratisation bans outdoor work from 12.30pm to 3pm between 15 June and 15 September, with a fine of AED 5,000 per worker and up to AED 50,000 where several workers are involved. The timesheet module should flag outdoor shifts inside those hours.

Source: [Khaleej Times, midday break rules and fines (6 July 2026)](https://www.khaleejtimes.com/uae/midday-break-violators-dh50000-fine-suspension-legal-action)

The second is the Wage Protection System. MoHRE's Ministerial Resolution No. 0340 of 2026, effective 1 June 2026, requires private employers to pay wages no later than the first day of each month for the previous month's work, and treats a company as compliant if it pays at least 85 per cent of wages due by that deadline. Odoo's UAE payroll, for example, uses each employee's identification number and bank account to extract the WPS report.

Sources: [EY Global Tax News, MOHRE Resolution No. 0340 of 2026 (26 May 2026)](https://globaltaxnews.ey.com/news/2026-1119) · [Odoo 19 documentation, UAE payroll](https://www.odoo.com/documentation/19.0/applications/hr/payroll/payroll_localizations/united_arab_emirates.html)

Worker files hold passports and Emirates IDs. Federal Decree-Law No. 45 of 2021, in force since 2 January 2022, prohibits processing personal data without consent except in defined cases and sets rules for transfers abroad. Our guide to [the UAE PDPL](https://oxedge.com/insights/uae-pdpl-explained-for-product-teams/) covers what that means for software.

Source: [u.ae, data protection laws](https://u.ae/en/about-the-uae/digital-uae/data/data-protection-laws)

**How OXEDGE does this**

We map your contracting workflow first, then fit and connect the system around it.

- A process map of one live job: cost codes, commitments, valuations, retention and variations.
- A vendor demo script built on your own contract, subcontract and certificate, with a scoring sheet.
- Data migration of open jobs, open subcontracts and retention balances, checked line by line.
- A phone site app for diaries and timesheets in Arabic and English, connected to the ERP.

[CRM and ERP solutions at OXEDGE →](https://oxedge.com/crm-erp-solutions-dubai/)

## Before and after: one month's valuation cycle

Judge a construction system by following one monthly valuation from site to cash. On the left, a spreadsheet-run month; on the right, the same month in one [ERP system set up for contracting](https://oxedge.com/crm-erp-solutions-dubai/).

> Judge a construction system by following one monthly valuation from site to cash.

*Before and after workflow for one monthly valuation at a UAE contractor, drawn from the steps described in this guide.*

On the right, client certificates, subcontractor certificates and the cost report all agree, and reporting moves from month end to the week, when an overrun can still be acted on.

## E-invoicing and VAT from 2027

![Paper invoices dissolving into a stream of dots through a steel pipe, showing UAE e-invoicing and VAT for construction companies from 2027.](https://oxedge.com/wp-content/uploads/2026/11/construction-erp-software-uae-s5.jpg)

E-invoicing covers business-to-business and business-to-government transactions, which covers almost every contractor invoice. Businesses with revenue above AED 50 million must appoint an accredited service provider by 30 October 2026 and go live by 1 January 2027; the rest appoint by 31 March 2027 and go live on 1 July 2027.

Sources: [Ministry of Finance, e-invoicing amendments (10 May 2026)](https://mof.gov.ae/en/news/ministry-of-finance-announces-targeted-amendments-to-einvoicing-system-decisions/) · [Ministry of Finance, e-invoicing scope and timelines (29 September 2025)](https://mof.gov.ae/en/news/ministry-of-finance-announces-the-issuance-of-two-ministerial-decisions-on-the-scope-of-obligations-and-the-timelines-for-implementing-the-electronic-invoicing-system-2/)

The rules keep moving: Ministerial Decision No. 197 of 2026, announced on 19 October 2026, excludes transactions within a tax group for 24 months from 1 January 2027 and drops the requirement to store e-invoice data inside the UAE.

Source: [Ministry of Finance, e-invoicing amendments (19 October 2026)](https://mof.gov.ae/en/news/ministry-of-finance-amends-electronic-invoicing-regulations-to-ease-the-burden-on-businesses/)

A progress invoice with retention, advance recovery and contra charges is exactly the kind of document that breaks a generic e-invoicing connector. Ask every vendor to send a real interim certificate through its provider in a test, and read our guide to [what UAE businesses must do for e-invoicing](https://oxedge.com/insights/uae-e-invoicing-what-businesses-must-do/) before you sign.

![OXEDGE brand card: a contractor's monthly valuation on a laptop with cost codes, value certified this period, retention deducted and the net amount due, beside a phone showing a site diary entry](https://oxedge.com/wp-content/uploads/2026/11/construction-erp-software-uae-inline.jpg)

*Illustrative OXEDGE graphic: one valuation from site diary to net amount due. Not a client project.*

## Choosing construction ERP software in the UAE and what it costs

![Hands checking one of three sets of blueprints on a site table, showing how to choose a construction ERP system and judge what it costs.](https://oxedge.com/wp-content/uploads/2026/11/construction-erp-software-uae-s6.jpg)

Sort vendors into four set-ups before the demos; price models differ as much as features.

| Option | Examples | Strongest at | Watch for | Best for |
| --- | --- | --- | --- | --- |
| General ERP with projects | Business Central, Odoo | One ledger, job costing, payroll and VAT | Valuations and retention may need add-ons | Mid-size contractors and fit-out firms |
| Construction management platform | Procore | Site, documents and project controls | Sits beside the finance system, not instead | Contractors whose pain is on site, not in accounts |
| Construction add-on to an ERP | Partner modules for the ERP you run | Valuations, retention and back-to-back terms | Partner depth and upgrade path | Firms on an ERP lacking contracting features |
| Custom layer on the ERP | Your own site app and portals | The exact workflow your team uses | API access and who maintains it | Contractors whose core ledger already works |

List prices give a starting point. Microsoft publishes Business Central at USD 80 per user per month for Essentials and USD 110 for Premium, paid yearly, with project management in both; UAE localisation comes from partners, and Arabic isn't on Microsoft's language list, so ask. Odoo publishes per-user prices but states that implementation isn't included. Procore charges an annual fee based on your annual construction volume with unlimited users.

Sources: [Microsoft, Business Central pricing](https://www.microsoft.com/en-us/dynamics-365/products/business-central/pricing) · [Microsoft Learn, Business Central country availability and languages](https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/compliance/apptest-countries-and-translations) · [Odoo pricing](https://www.odoo.com/pricing) · [Procore pricing](https://www.procore.com/pricing). Checked 20 October 2026.

Licences are rarely the biggest line: configuration, migration, training and add-ons usually decide the budget, so compare three-year totals from written quotes. Our article on [custom software versus ready-made tools](https://oxedge.com/insights/custom-software-vs-ready-made-tools-uae/) helps when no package fits the subcontract workflow. OXEDGE's own 2026 price bands are on the [OXEDGE pricing page](https://oxedge.com/pricing/), and examples of what we have built are on [our work page](https://oxedge.com/work/).

Also read: [Best ERP software in the UAE](https://oxedge.com/insights/best-erp-software-uae/) · [Odoo ERP in the UAE](https://oxedge.com/insights/odoo-erp-pricing-uae/)

## Questions UAE buyers ask

### Is there a standard retention percentage in the UAE?

No law sets one; the contract does. 10 per cent of each certificate, capped at 10 or 5 per cent of the contract price, is common, half released at taking-over.

### Can a general ERP handle construction job costing?

Yes, if every transaction carries a job and cost code and commitments are counted. Test subcontract valuations and retention first; they most often need an add-on.

### Does VAT apply to retention when it's withheld?

Advisers explain that VAT on retention falls due when it's released or invoiced, not when withheld. Confirm with your tax adviser.

### Do we need an ERP before e-invoicing goes live?

You need a system that can produce structured invoices and send them through an accredited provider by your go-live date: 1 January 2027 above AED 50 million in revenue, 1 July 2027 below it.

### How much does ERP software cost for a contractor in Dubai?

Microsoft lists Business Central at USD 80 per user per month for Essentials and USD 110 for Premium, paid yearly. Licences are rarely the biggest line: configuration, migration, training and add-ons usually decide the budget, so compare three-year totals from written quotes.

### What is the difference between ERP and CRM?

A CRM manages leads, customers and sales. An ERP runs the work after the sale, such as job costing, purchasing, payroll and accounts. Many contractors use both and connect them; see our [CRM and ERP software services in Dubai](https://oxedge.com/crm-erp-solutions-dubai/).

**Work with OXEDGE**

Book a 30-minute ERP fit call for your contracting business.

We look at how you cost jobs, value subcontractors and track retention today. You leave with the system type that fits and the questions to put to vendors.

[Book the fit call](https://oxedge.com/contact/) [WhatsApp us](https://wa.me/971508153521?text=Hi%20OXEDGE%2C%20I%20read%20your%20guide%20on%20construction%20ERP%20in%20the%20UAE) [Explore CRM and ERP](https://oxedge.com/crm-erp-solutions-dubai/)