What this calculator compares
Match the domestic cold-water tank, confirmed capacity units, material, condition, potable-water suitability, repair boundary or replacement specification, supports, fittings and access route. A product price alone excludes unconfirmed installation work. Capacity is a specification to match, not a price or structural-load formula. Keep quantity 1 and select whole-job for labour/package and any separately charged provider materials. Ask the provider to extend all per-item, linear-metre, hourly or capacity-based offers into a written total for the agreed job first; those units are not the item count here. Mark charges already inside the package included and enter only separately charged lines. Customer-bought materials use the final receipt total including any retail VAT; do not tax them again.
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
Labour is either the entered whole-job total or a per-item amount multiplied by the shared item quantity. Separate provider parts use the same unit choice. Each visit and extra charge is a whole-job amount added once. Use agreed whole-job totals for mixed models, repair units or prices.
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, not market prices: AED 1,000 for the agreed whole job plus AED 150 and AED 100 of separately charged provider extras totals AED 1,250 before tax, or AED 1,312.50 if all provider amounts exclude 5% VAT. Materials, the visit and every other required line are confirmed included or not needed. Do not add an included item twice.
Assumptions and limits
Money is entered in AED with up to two decimal places. Each monetary field is limited to AED 1,000,000; item counts to 100; handyman lists to 12 rows; hours to 100; and technicians to 20. 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.
Do not enter a tank, improvise a patch or use this tool to size a tank, assess roof loading or declare water safe to drink. Keep people clear of an unstable or actively leaking tank and obtain competent assistance. Repairs, materials, support and return to service need the appropriate specialist assessment.
Read the related Dubai cost and scope guide·Plumbing services