Marketing consultants are independent advisors who help small and mid-size businesses plan and improve their marketing. They send invoices for strategy work, audits, ongoing advisory retainers, campaign oversight, and sometimes hands-on execution such as email setup or ad management. Clients are usually business owners or marketing managers who expect clear deliverables and a record of what was done each month.
Create an invoice for payment collection
Upload logo
PDF will be generated with filename:
Invoice_1001_Client_2026-10-14.pdf
Most marketing consultants use one of four models. Hourly billing is common for new clients, short advisory calls, and work with unclear scope. Project fees cover defined deliverables such as a marketing audit, a go-to-market plan, or a brand positioning workshop. Monthly retainers cover a set number of hours or a set list of tasks, such as weekly strategy calls, reporting, and campaign review. Some consultants also offer day rates for workshops and on-site training. Ad spend and software subscriptions are normally billed to the client separately, either paid directly by the client or passed through at cost with a clearly labeled line. Value-based pricing and performance bonuses exist but should be written into the agreement, with a stated way to measure results, before they appear on an invoice.
| Service | Priced | Typical range |
|---|---|---|
| Hourly consulting and advisory calls | per hour | $75-250 |
| Marketing audit (channels, website, funnel review) | flat fee | $1,000-5,000 |
| Marketing strategy and annual plan | flat fee | $2,500-10,000 |
| Monthly advisory retainer | per month | $1,500-6,000 |
| Paid ads management (Google, Meta) | per month | $750-3,000 or 10-20% of ad spend |
| Email marketing setup and automation build | flat fee | $750-3,500 |
| Workshop or team training session | per day | $1,000-3,500 |
| Monthly reporting and analytics review | per month | $300-1,200 |
Typical US ranges. Rates vary by region, experience, and job size.
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Marketing strategy retainer - May (4 weekly strategy calls, priorities and campaign review) | 1 month | $2,500.00 | $2,500.00 |
| Email welcome sequence: strategy, outline, and review of 5 emails | 1 flat fee | $900.00 | $900.00 |
| Google Ads account review and keyword restructuring | 6 hours | $140.00 | $840.00 |
| Monthly performance report and recommendations | 1 report | $400.00 | $400.00 |
| Reimbursable: landing page testing software, May subscription (at cost) | 1 month | $49.00 | $49.00 |
| Total | $4,689.00 | ||
Notes: Payment due within 15 days of invoice date. Ad spend is billed directly to the client's ad accounts and is not included here. Hours beyond the retainer scope are billed at $140 per hour with prior approval. Late balances are subject to a 1.5% monthly fee.
Clients on retainers need to see which month and which services the charge covers, so it matches the agreement.
Strategy work is hard to see. Listing audits, calls, reports, and campaign work shows what the client received.
Keeps your fee distinct from pass-through costs and avoids confusion over where the client's budget went.
Subscriptions or stock assets bought on the client's behalf should be labeled at cost, with a receipt available on request.
Ties the invoice to the scope of work and helps resolve disputes about what was included.
Larger companies often will not pay an invoice without it, and missing numbers cause delays.
Extra revisions or added channels should note the approval date or email so the added fee is not questioned.
Many marketing consultants invoice retainers at the start of the month, due in 7 to 15 days, and bill projects with a deposit of 30 to 50 percent upfront and the balance at delivery or in milestones. Hourly work is usually invoiced monthly or biweekly. Net 15 or net 30 is typical for business clients, and larger companies may require net 45 or 60 through accounts payable. A late fee of 1 to 1.5 percent per month is common if stated in the contract. Payment is usually accepted by ACH, card, or check. Check your local rules on late fees and interest before you apply them.
Invoice at the start of the period rather than the end. Advance billing keeps cash flow steady and makes it easier to pause work if payment stalls.
State the number of calls, hours, or deliverables and whether unused hours roll over. Most disputes come from clients assuming unlimited access.
Have clients pay ad platforms directly where possible. If you front the cost, bill it at cost or with a disclosed fee, and never mix it into your consulting line.
For strategy projects, name the milestone, such as research complete, draft plan delivered, and final presentation, so payment triggers are clear.
Attach a short summary of work completed and results. Clients who see progress pay more promptly and are more likely to renew.
Use hourly for open-ended advice and early engagements where scope is unclear. Use project or retainer pricing once you understand the work. Fixed fees reward efficiency and are easier for clients to budget.
The cleanest approach is for the client to pay the ad platform directly. If you pay it and get reimbursed, list it as a separate line at cost and include platform statements. Do not mark it up unless your agreement says so.
Short intro calls are usually free. Paid discovery sessions, audits, or research done before a proposal can be charged as a separate flat fee, and many consultants credit it toward the full project if the client continues.
Most consultants avoid guaranteeing outcomes because many factors are outside their control. If you offer performance fees, define the metric, tracking method, and time period in the contract and bill the bonus as a separate line.
It depends on your state. Some states tax consulting or marketing services and others do not. Check with your state revenue department or an accountant, and show any tax as its own line when it applies.
Send a Marketing Consultant estimate for approval, then turn it into an invoice when the work is done.
Marketing Consultant estimate template