Should taxes be included in the tender price?

Price basis

Identify which amount the buyer is asking for

Start with the price schedule, evaluation method, ceiling and draft contract. A buyer might ask for net unit prices, a separate tax line and a gross total. Another form might ask for one inclusive figure. Record the instruction beside each destination amount. Do not infer the treatment of the total from the heading of a unit-price column, especially when different lots or optional services have separate instructions.

The contract value used to choose a procurement procedure is another amount again. The UK government’s Valuation of Contracts guidance includes VAT when estimating value for threshold purposes. That instruction concerns the authority’s estimate. It does not, by itself, say how a bidder should complete a net-price field or how the published scoring formula treats tax. Use the actual bid documents for those questions.

If a ceiling is unclear, ask whether it includes applicable tax and whether the limit applies to the base, options or total contract exposure. Phrase the question around the published amounts and clauses. A buyer can clarify its required presentation and contractual allocation. Its answer does not replace the supplier’s tax analysis or make an otherwise taxable transaction exempt.

Keep the analysis independent of the spreadsheet display. A tax-exclusive offer may still require tax to be added to an invoice. A tax-inclusive contractual price may leave the supplier less net revenue than expected. Before approval, the reviewer should be able to follow one amount from the bid cell to the contract and proposed invoice without guessing what “total” means.

Tax review inputs

Give the adviser a transaction, not just a customer name

Write down the legal entity that will sign and invoice, the customer entity, their locations and relevant registrations. Add what is being supplied, where work or delivery occurs, who transports or installs goods and when supply is expected. A group brand does not identify the contracting taxpayer. An analysis for one subsidiary cannot simply be reused when another subsidiary submits the offer.

The European Commission’s place-of-taxation guidance distinguishes goods, acquisitions, imports and services. It identifies a specific rule for goods installed by or on behalf of the supplier. This is why a bid involving equipment installation needs a more precise description than “international sale”. Have the reviewer classify the proposed supply rather than select a rate from the destination country alone.

For a combined equipment, licence and support offer, show the components and their commercial relationship. Do not split an economically single supply merely to obtain a preferred tax result. Equally, do not apply one treatment across independent supplies without review. Price rows describe the buyer’s form; they do not conclusively determine the tax classification of the transaction.

For EU registration checks, Your Europe explains that VIES retrieves information from national systems. An invalid response can reflect an inactive intra-EU registration or an unfinished registration, as well as a nonexistent number. Retain the dated result and resolve discrepancies with the relevant authority. A failed technical request should remain a failed request, not be recorded as a valid or invalid registration decision.

Registration evidence is one input. Ask for the facts still needed to approve the treatment, such as the customer’s capacity in the transaction, an establishment’s involvement or delivery evidence. A public-sector name is not a blanket exemption certificate. The Commission’s guidance on VAT liability expressly includes circumstances where a non-taxable legal entity can owe VAT. Obtain transaction-specific confirmation rather than interpreting the buyer’s public status yourself.

Treatment record

Keep zero-rated, exempt and reverse charge distinct

A zero amount in an invoice tax column can arise for different reasons. HMRC’s exemption guidance distinguishes UK exempt supplies from zero-rated taxable supplies and explains their different implications for recovery. Keep the applicable legal description and jurisdiction beside the numeric value. Do not compress every case into a single “no tax” label that the invoicing team cannot interpret.

Reverse charge concerns who accounts for tax. The Commission describes customer liability for certain services under Article 196, subject to conditions concerning the customer, service and supplier establishment. It is not a general zero rate for cross-border trade. Have the reviewer confirm whether the conditions apply and what invoice wording and reporting are needed. A different supply in the same contract may require a different answer.

The working record should identify supply or line reference, seller, customer, jurisdiction, tax type, tax base, approved rate or treatment, liable person, supporting evidence, reviewer and review date. Add the corresponding price field and any conditions that must remain true. For purchases, include recoverability and its evidence separately. These fields make it possible to locate a disputed conclusion without re-reading the entire tender.

Use a pending state for missing evidence. Record the question, owner, deadline and financial sensitivity internally. If the portal accepts only a numeric tax rate, that is a reason to resolve the issue or obtain permitted entry instructions. It is not authority to encode uncertainty as zero. Do not attach an alternative tax assumption or reservation to the submitted offer unless the procurement permits it.

Cost and recovery

Put only the supported nonrecoverable amount into cost

Output tax relates to the supplier’s sale; input tax relates to its purchases. Review them separately. A subcontractor’s invoice may include tax even when the prime contractor’s invoice follows another treatment. Identify the purchasing entity and intended use, then ask finance which amount can be recovered under the applicable rules and which amount remains a cost. A tax registration alone does not justify full recovery of every expense.

HMRC’s guidance on partial exemption illustrates why recovery cannot be assumed uniformly: purchases associated with exempt activity and mixed use require specific treatment. For an actual bid, obtain the method applicable to the company, including any restrictions or adjustments. Do not invent a recovery percentage from the bid’s own revenue mix or copy a percentage approved for another legal entity.

Enter purchase value excluding tax, purchase tax, supported recoverable amount and nonrecoverable amount in separate working columns. Include the nonrecoverable portion once in the relevant cost. If a supplier quote already includes irrecoverable tax, do not add it again as a general tax allowance. If recoverability is still uncertain, show the alternative cost and its effect on margin for approval.

Recovery can also take time. Record the expected payment date and the process and timing of any credit or refund without promising that it will arrive on a specific day. An amount that is recoverable in principle may still need funding before customer payment. For imports, identify the importer, import-tax responsibility and documentation with the tax or customs specialist. Keep duties, import VAT, freight and clearance charges separate so the same amount is not hidden in several cost lines.

Worked example

A gross ceiling is not the revenue available to cover costs

The fictional Brookhaven bid has a confirmed tax-inclusive price ceiling of 120,000 monetary units. For this arithmetic exercise only, the sale carries a single invented tax rate of 20%. This is not a current country rate or a conclusion about any real supply. The example assumes all listed delivery costs are expensed for the bid model and excludes financing, withholding, duties and other unlisted costs. Its margin is net sales less those listed costs, before income tax.

The maximum net sales amount is 120,000 ÷ 1.20 = 100,000. The remaining 20,000 is output tax. Subtracting 20% of the gross ceiling would instead produce 96,000, which uses the wrong base. Quoting 120,000 as the net price and adding 20% would produce a 144,000 invoice and exceed the assumed ceiling. Confirm the inclusive basis before doing either calculation.

Listed delivery costs excluding purchase tax are 70,000. Purchase invoices add 6,000 of tax. In this fictional case, the reviewer has confirmed that 4,500 is recoverable and 1,500 is not. The cost used for the defined margin is therefore 71,500, leaving 28,500, or 28.5% of net sales. The recovery percentage is an assumed fact of the example, not a method readers should apply to their own purchases.

Cash paid for those listed costs is initially 76,000 if all the purchase tax is paid at that point. If the sale and purchases fall in the same tax settlement period and the stated recovery is available then, the simplified net tax payment is 20,000 less 4,500, or 15,500. Across those flows, 120,000 less 76,000 less 15,500 leaves 28,500. Different due dates change the financing need even when the eventual total agrees. This reconciliation is a teaching example, not instructions for completing a tax return.

Two errors move the bid in opposite directions. Counting all 6,000 of purchase tax as permanent cost understates the example’s margin by 4,500. Assuming all of it is recoverable overstates margin by 1,500. Retain the approved recovery amount and its evidence beside the calculation. A blanket contingency cannot correct a model that has confused tax collected, tax recovered and tax borne.

Payment deductions

Check what the customer may deduct before paying

A contract can create a difference between the amount invoiced and the cash received because the payer must withhold tax. Do not apply a withholding assumption to every foreign customer. Identify the relevant country, payment type, income source, recipient and governing rules with a tax adviser. Corporate income tax, VAT and withholding are different questions; a percentage used for one is not a substitute for another.

IRS Publication 515 for 2026 illustrates this distinction for US withholding on payments to foreign persons. Its rules consider income source and payment category, and reduced treatment can depend on valid documentation and treaty eligibility. A US customer address alone does not settle the treatment of a services or licence payment. Use the current applicable rules and obtain advice rather than copying a headline rate into every international proposal.

If withholding applies, show the gross amount, withholding basis, expected cash deduction, required certificate and the reviewer’s conclusion on possible relief or credit. Do not assume that an expected credit is immediately available cash or that every deduction is a permanent economic loss. Keep unconfirmed relief out of the approved recovery figure and quantify the consequence if it cannot be obtained.

Check whether the contract allocates the burden or permits a gross-up, meaning an increase intended to preserve a specified net receipt after withholding. Such wording can change the price and may be prohibited by the tender. Do not insert it without commercial and legal approval through a permitted route. If the customer will not change the terms, the decision is whether the reviewed economics remain acceptable, not whether the spreadsheet can hide the deduction.

Price approval

Release a price whose tax basis can survive the handover

Give the approver a reconciled record, not a folder of disconnected tax links. It should show the final price version, treatment by material supply, evidence relied upon, cost and cash consequences, remaining questions and the decision requested. Where alternative treatments are still under review, calculate their effect internally. The bid owner must decide whether release is possible under the tender requirements with qualified advice on the unresolved issue.

Check the offer narrative, price schedule and contract response for inconsistent tax language. A net figure in the workbook and an unconditional inclusive promise in the cover letter can create a dispute even if both were reviewed separately. Use permitted clarification channels before the deadline. A private assumption in the estimating model does not become a right to charge more after award.

At handover, pass the approved basis to the people who will contract, purchase and invoice. Define review triggers: a different contracting entity, changed delivery location, added installation, altered customer status, delayed supply or a relevant rule change. Have the adviser confirm which date determines the applicable treatment. The publication date of this guide and the date of bid approval do not freeze tax law for the contract term.

For the next price review, prepare one transaction record and test one material line through the full chain: instruction, tax conclusion, bid amount, cost and expected settlement. Resolve any mismatch before extending the treatment to the other lines. This keeps the tax decision tied to the offer the customer will receive and the cash the delivery team will have to manage.