How to build a corporate communications budget from verified cost units

Corporate communications costs and pricing cannot be reduced to an England average. No authoritative source reviewed on 6 September 2026 measured a comparable price for the full job described here. This guide therefore uses a blank cost model for Cedar Vale Engineering Ltd, a fictional organisation considering how to communicate a proposed consolidation of one England customer-support site.

The decision is narrower than an annual communications budget. Cedar Vale must compare its existing manual route with any proposed external service for one authorised source copy, employee and public variants, accessibility, approval, publication, correction and archive. No supplier, price, salary, VAT result, saving or return is assumed.

Set the unit before asking for money

A quote has little meaning until the buyer specifies the job. The cost record should identify the legal buyer, announcement version, eligible audiences, required channels, approved languages and formats, delivery period, acceptance event, retention need and exit state. A newsroom page, employee briefing, direct email, social post, monitoring report and incident update are different deliverables.

Record every monetary line with these fields:

Field	Required entry
Currency	currency named in the applicable quote or internal record
VAT	supplier-stated treatment plus independent tax-review status
Unit	hour, approved asset, message, user, month, project or another defined unit
Quantity	buyer-owned volume and the evidence used to estimate it
Period and term	charge period, start and end, minimum commitment and renewal point
Inclusions	exact work, service edition, support and accepted deliverables
Exclusions	buyer labour, extras, limits and work priced elsewhere
Source	contract, quote, invoice, payroll record or internal time record
Evidence date	issue, access and expiry or recheck date
Assumptions	owner, confidence, dependency and sensitivity range

Leave the value blank if any of those fields is unresolved. A currency symbol without a unit is not usable evidence. Neither is a global starting price copied into a UK buyer model.

Separate cash from economic cost

Cash cost is an amount the organisation expects to pay or receive. Internal labour is different: it records time that staff cannot use elsewhere, even where no new invoice appears. Keep the person's function, approved time-record source, employer-cost method, period and allocation rule visible. Do not manufacture a salary or hourly rate.

HM Treasury's Green Book 2026 is government appraisal guidance, not a private-company pricing rule. It nevertheless demonstrates a useful discipline: compare options, identify costs over the relevant life, consider uncertainty and keep unmonetisable effects visible. Cedar Vale needs qualified finance review before adapting that discipline to its own accounts.

Use separate totals for:

• supplier cash committed under contract;
• internal labour valued under an approved finance method;
• one-off implementation and migration;
• recurring service, maintenance and support;
• contingent correction, incident and exit work;
• items recorded but not monetised because evidence is absent.

Do not add VAT mechanically. HMRC's VAT record guidance distinguishes purchase and sales records, invoices, adjustments and credit or debit notes. Whether Cedar Vale bears, records or may recover any amount depends on its facts and valid documents. A named tax reviewer must decide the treatment.

Cost the work that makes publication possible

The source copy is only one input. Budget rows should cover discovery, audience and employee research, fact collection, claim substantiation, drafting, editing, approval, accessible formats, rights clearance, privacy and PECR analysis, security review, sector review, production, publishing, monitoring, correction and retention.

Official copyright guidance explains that protection can cover written work, images, software, web content and recordings. It does not establish who owns a Cedar Vale asset or what a licence costs. Record the exact asset, owner, permitted use, territory, term, edits, attribution and renewal rather than hiding rights inside a production fee.

GOV.UK's accessible communication formats page, updated 17 June 2026, is written for government communication. It supplies planning prompts for formats and supplier work, not a private-sector cost benchmark. Cedar Vale should list each required user task and alternative format, then obtain dated evidence for production, testing, correction and ongoing availability.

Keep technology and supplier risk visible

Software may charge by user, message, module, storage, project or another unit. Managed services may charge for availability, work performed or accepted output. Never combine those mechanics until quantities and deliverables use a common job definition.

Implementation needs its own rows: configuration, access design, integration, data preparation, testing, training, documentation and rollback. Ongoing operation may include administration, support, licence changes, log storage and account recovery. Exit may require export, migration, parallel running, deletion evidence and contract assistance.

The NCSC's supply-chain guidance discusses assurance, contracts, reporting, review and action on findings. It does not price a control or certify a vendor. Cost the evidence Cedar Vale actually requires, and suspend procurement if identity, security, continuity or exit remains unresolved.

If a supplier processes personal data, first determine the real arrangement. The ICO's controller and processor contract guidance describes Article 28 requirements where that relationship applies and is marked under review following DUAA. Contract preparation, role analysis, transfer review, rights support, retention and deletion are separate work items. Purchasing a service does not create a lawful basis or PECR permission.

Compare pricing structures without declaring a winner

The manual baseline, fixed project, time-based engagement, retainer, subscription, usage charge and hybrid arrangement allocate uncertainty differently. Compare them on one common unit: the full Cedar Vale job through accepted close-out.

For each route, capture committed cash, variable formula, quantity basis, approval for changes, pass-through expenses, payment timing, VAT status, minimum term, unused capacity, overage, correction, termination and exit. A fixed figure can exclude expensive change. A low subscription can require substantial internal administration. A retainer can reserve capacity without defining accepted output.

The comparison ends unresolved when the buyer lacks comparable evidence. Procurement should not convert missing fields into a favourable score.

Build a base case and stress it without fake numbers

Create three buyer-owned columns: lower-demand case, planning case and higher-demand case. Do not prefill them. Every quantity must have an owner and source, such as an approved channel plan, staff time record, rights schedule or supplier quote. Each rate must point to a current contract, invoice, payroll method or formally approved assumption.

For a cost line:

line cash cost = eligible quantity x contracted unit charge + approved fixed charge + documented pass-through cost

For internal work:

internal economic cost = approved staff time x finance-approved employer-cost rate

For the full option:

whole-route cost = cash commitments + internal economic cost + implementation + review + operation + correction allowance + incident allowance + exit

These are calculation structures, not estimates. Sensitivity should vary one uncertain input at a time and identify the value at which the decision changes. If the result depends on an unevidenced assumption, mark the option unresolved.

Treat value and causation as separate questions

A published page, sent message, media mention or stakeholder enquiry is not revenue. Start with observed financial records that the finance owner can reconcile. Then state any attribution rule. If the buyer wants a causal claim, it needs a credible counterfactual and an evaluation design that addresses other causes.

HM Treasury's Magenta Book, updated 15 May 2026, covers evaluation design, use and interpretation for government. It is not proof that corporate communication caused a private outcome. It does support planning evaluation before delivery and matching the method to the question.

Keep four fields apart: observed outcome, amount assigned by an attribution rule, modelled scenario, and estimated causal increment. Report uncertainty and missing data beside each. A positive attributed figure cannot repair a failed legal, accessibility, privacy or security gate.

Budget for correction, incidents and exit

Routine plans often omit the point at which work goes wrong. Add blank lines for factual correction, accessible reissue, rights dispute, privacy objection, account recovery, supplier incident, urgent executive review and withdrawal. The NCSC's incident communication guidance supports preparation, coordination and accurate information in a cyber incident. It does not prescribe Cedar Vale's staffing or expenditure.

Exit belongs in the initial approval. Record who exports source copies, approvals, rights evidence, contact suppressions, logs and corrections; the required formats; the deletion route; transition support; residual obligations; and the date the manual baseline can resume. A renewal decision should compare remaining value with the cost and risk of continuation, change or exit.

Approve the evidence, not the appearance of precision

The budget owner should reject a row that lacks a unit, quantity, period or source. Finance and tax reviewers determine accounting and VAT treatment. Legal, privacy, security, accessibility, IP, employment, procurement and corporate owners sign their own gates. No favourable total overrides a failed gate.

Set a review date for every quote, internal rate, licence, contract, tax position and assumption. Reforecast when scope, audience, delivery route, supplier terms, staffing, rights or incident exposure changes. Until buyer records fill the blank model and named reviewers approve it, Cedar Vale has no supported budget, saving or return figure. The publication status remains hold.