Marketing Consultant Invoice Template — Retainer, Project
Strategy projects with deliverables, monthly retainers for ongoing advisory, ad spend pass-through, performance fees tied to outcomes. The template separates consulting fees from media spend cleanly.
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What goes on a marketing consultant's invoice
●Consulting fee (project, retainer, or hourly). State the deliverable or scope.
●Discovery / audit phase. Often a separate fixed-price line.
●Implementation / build phase. Where you deliver assets, automations.
●Ad spend pass-through (if managing). At cost — never marked up.
●Tools / software pass-through (analytics, automation). If sourcing on client's behalf.
●Performance bonus. Tied to defined KPI; rare but powerful.
●Subcontractor / specialist work. Pass-through with admin %.
How marketing consultants usually structure fees
Project: 30/40/30 or 50/50 milestone billing per the SOW.
Retainer: monthly in advance; reconciliation at quarter-end.
Ad spend / tools: pass-through at cost, separately invoiced.
Performance bonus: invoice on KPI achievement per the agreement.
Tax notes
Consulting services are typically fully taxable. Cross-border B2B is often reverse-charge under EU/UK rules. Performance bonuses follow the same tax treatment as the underlying consulting fee.
Frequently asked questions
Should I invoice ad spend through me?
Usually cleaner to have the client own the ad accounts directly. If you do invoice it, pass through at cost (never marked up) and itemise separately.
How do I structure a performance bonus?
Define the KPI clearly (revenue lift, lead volume, ROAS) with a baseline and measurement window. Invoice on KPI achievement with the calculation shown.
How do I bill a CMO retainer?
Monthly fee for an agreed scope (e.g., '20 hours/month strategy + execution + reporting'). Track hours; reconcile at quarter-end with overage invoice if applicable.
How do I invoice a discovery / audit phase?
Fixed-price as its own deliverable. Output is a written report and recommendations. Subsequent build phase quoted separately based on findings.
Sample wording for a marketing consulting invoice
Realistic, copy-and-paste-ready line items marketing consultants typically use. The rates here are ballpark for a mid-cost US market, so adjust them to yours.
●Strategic engagement — discovery + GTM audit + 90-day plan (40 hrs over 4 weeks at $225/hr): $9,000
●Customer-research interviews (8 interviews, 45 min + synthesis) (20 hrs): $4,500
●Competitive landscape analysis — 12 competitors mapped + positioning brief (12 hrs): $2,700
●Workshops — 2 strategy workshops with leadership team (3 hrs each) (6 hrs): $1,350
●Deliverables — strategy doc, GTM playbook, 90-day execution roadmap (included): no separate charge
●Implementation oversight retainer — first 90 days post-engagement (8 hrs/mo for 3 months at $225/hr): $5,400
●Travel — on-site days at client HQ (receipts attached, pass-through): $1,485
Notes: Strategic deliverables are confidential and licensed for internal use only. Customer interview transcripts redacted of identifying information unless permission granted. Implementation oversight is hourly above retainer; pre-paid hours roll one month then expire. Late-payment fee 1.5%/month.
How consulting engagements actually pay
Strategic consulting pays in two structures: fixed-fee project (50% on signing, 50% on delivery) or retainer (monthly in advance). Day-rates ($1,500-5,000/day depending on seniority and specialisation) are for shorter engagements or per-workshop billing. Fortune-500 procurement is the slowest payer in any consulting line: Net 30 is the contract, Net 60 is the practice, and the W-9-plus-SOC-2-questionnaire-plus-MSA process can take 30-60 days before the first invoice can even be submitted.
Equity or revenue-share deals come up in startup-marketing consulting; most experienced consultants decline them in favour of cash. Implementation oversight (3-6 months post-strategy) is the highest-leverage retainer because the work is already scoped and your involvement is steady. Always invoice month-1-retainer the day the engagement starts, not the day the first workshop happens. Procurement reviews need long lead times.
Five billing mistakes that stall your payments
●Selling 'strategy and execution' as one engagement. Strategy and execution are separate engagements with separate fees. Bundling them anchors the price at the lower number and dilutes accountability. Sell strategy first, deliver the playbook, then sell implementation as a separate engagement with a clear scope.
●Quoting day-rates without specifying deliverables. Day-rates without deliverables get re-scoped mid-engagement. Quote: 'Engagement: 40 hrs across 4 weeks at $225/hr; deliverables include strategy doc, GTM playbook, and 90-day roadmap.' Hours are the meter; deliverables are what you're selling.
●Forgetting the customer-research line. Strategy without customer research is hot takes. Bill the interviews: 'Customer interviews — 8 calls + synthesis: $4,500.' Clients value research-grounded strategy at 2-3× higher fees than vibes-based strategy. The interview line is what makes the recommendation defensible.
●Not requiring a workshop sign-off on the strategy. Strategy delivered as a 60-page PDF lands in a Notion folder and gets quietly ignored. A workshop with leadership at delivery creates alignment, surfaces objections, and triggers buy-in. Bill it: 'Strategy delivery workshop — 3 hrs + prep: $1,000.' Worth its weight in implementation success.
●Treating travel as included. On-site days, flights, hotels — bill them at receipt with no markup. State on contract: 'Travel billed at receipts; client pre-approves travel above $1,500 per trip.' Folding travel into day-rate makes you eat $400 in airline ticket changes when the schedule slips.
US tax notes for marketing consultants
Marketing consulting services are non-taxable in nearly every US state (professional services). The exceptions are Hawaii (general excise tax), New Mexico (gross receipts tax), South Dakota (services generally taxable), and Washington (B&O service tax). California, New York, Texas, Florida — all exempt. Most consultants never trigger sales tax; check your specific state if you're in a GR/B&O state.
Federal: 1099-NEC at $600 from every business client. Consultant deductibles often missed: subscriptions to research and intelligence tools (SimilarWeb, SEMrush, Crunchbase, Apollo, ZoomInfo), customer-interview tools (Lookback, UserInterviews, where research participant fees are fully deductible), professional memberships (ANA, MMA, industry associations), continuing-ed (HBS Executive, Wharton, online programs), conference travel (Cannes Lions, ANA Masters of Marketing), and the under-claimed line for books, journals, and reading lists for engagement-specific research which add up to thousands annually.
Not tax advice — confirm specifics with your CPA or state department of revenue.
A few more questions consultants ask
How do I price strategy vs. implementation differently?
Strategy is fee-for-deliverable (a doc + a workshop = $X). Implementation is fee-for-time (hours, retainers, or fixed-monthly for a duration). Strategy is sold at premium because the value is in the thinking; implementation is sold at retainer because the value is in the consistency. Don't bundle — clients pay for strategy and expect implementation as 'support.'
Should I price by day-rate, hourly, or fixed-fee?
Depends on engagement type. Fixed-fee for clearly scoped strategic projects (anchors price at value, not effort). Day-rate for workshops or short-burst engagements ($1,500-5,000/day). Hourly for ad-hoc advisory and implementation oversight ($150-400/hr). Always state the basis on the SOW; mixing creates confusion.
How do I handle a client who wants to extend the engagement at the same fee?
Renegotiate on value, not duration. If the engagement is going well, that's a stronger negotiating position, not a weaker one. Implementation oversight at the post-strategy rate. Continued strategy at the original engagement rate plus inflation. Don't anchor at the original number forever.
Can I refuse to disclose my methodology or framework?
Yes — and you should treat methodology as IP. The deliverable is the strategy customised to the client; the framework is your asset. Share the framework's outputs, not the framework itself. State on the contract: 'Methodology and frameworks remain consultant's IP; deliverables are licensed for client's internal use.'
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