What this calculator compares
Keep the actual user, chair, monitor arrangement, storage and usable knee space in the design brief. Joinery and electrical work need named responsibilities. Equipment purchases use final receipt totals; do not add them if already supplied in the package. Use whole-project amounts, never per-metre, per-panel or per-square-metre rates. Ask providers to extend measured quantities, minimum charges and scope allowances into written totals first. Keep quantity 1. All provider amounts must share one confirmed VAT basis; normalize mixed tax bases before entry. Customer purchases use final receipt amounts. Deposits are not discounts or visit credits; refundable deposits and direct authority fees remain outside this result.
This tool calculates from your entered quotations; it does not estimate a market tariff or verify a provider. Blank prices, unknown tax terms and unresolved extras keep the result incomplete. You must confirm the topic-specific scope checks before a cost difference appears.
How the arithmetic works
Every amount is a complete agreed project total, entered once. Unit counts are fixed at one; per-item and hourly rates are not available in this context. Ask each provider to extend its measured quantities, team-hours and minimum charges before entering labour, materials or extras. Keep unmatched scope unresolved.
Provider amount = labour/package + separately charged provider parts + visit + extras − eligible visit credit. A credit cannot exceed either the charged visit fee or the entered provider work excluding that visit. It cannot offset customer-bought parts. An included or no-charge visit is not deducted again. This model does not handle a separate cash refund arrangement.
The standard UAE VAT rate is 5%. VAT is added once to VAT-exclusive provider amounts, and not added to amounts already including VAT or confirmed not charged. Enter all of one provider’s amounts on the same VAT basis.
Project cost = provider total after its VAT treatment + your separately purchased parts at their final retail total, including any retail VAT and delivery. This keeps customer-supplied parts visible without taxing them twice. Already-owned parts count at the value you explicitly enter; entering zero deliberately excludes their historic purchase cost. No deposit or prior payment is deducted, so the result is not a remaining balance.
A worked example
Illustrative arithmetic only: AED 8,000 agreed joinery package plus AED 1,000 separate electrical and lighting work equals AED 9,000 before VAT, or AED 9,450 when both exclude 5%. A deposit reduces the balance, not the project price.
Assumptions and limits
Money is entered in AED with up to two decimal places. Each monetary field is limited to AED 1,000,000, and the project count is fixed at one. Enter extended whole-project amounts only. These are input-error safeguards, not market, capacity or safety limits. Invalid values are not silently rounded into valid inputs. Calculated monetary lines, VAT and totals are rounded to two decimal places.
Unentered damage, scope changes and future work are excluded. The known-provider subtotal uses the amounts as entered, without adding unconfirmed VAT or customer purchases; it is not an all-in quote. Even a complete cost comparison does not certify suitability, workmanship, insurance or approval.
No ergonomic suitability, safe desktop span, wall anchorage or electrical capacity is calculated. Test the working position and ask the relevant specialists to assess support and service alterations. A carpentry listing does not establish electrical capability.
Read the related Dubai cost and scope guide·Custom carpentry enquiries