Freelance and independent project managers run projects on behalf of small businesses, agencies, nonprofits, and larger companies that need delivery help without a full-time hire. They bill for planning, schedule and budget management, stakeholder coordination, vendor management, and status reporting. Invoices usually tie to hours worked, a monthly retainer, or milestone payments on a defined project.
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Most independent project managers bill hourly or on a monthly retainer. Hourly works for short or open-ended engagements, while a retainer with a stated hour allotment suits ongoing work such as a six-month website rebuild or a product launch. Fixed-fee pricing is common for defined deliverables like a project plan, a project audit, or a kickoff and planning package, and is often split into milestone payments. Some PMs charge a percentage of project budget (often 5-15%) on construction or event work, but this is less common for solo consultants. Certified PMs (PMP, PMI-ACP, CSM) and those with industry experience in IT, construction, or healthcare tend to charge at the upper end. Expenses such as software licenses, travel, and printing are usually billed separately at cost. Define what happens when hours exceed the retainer, and bill change requests separately.
| Service | Priced | Typical range |
|---|---|---|
| Hourly project management (general) | per hour | $60-130 |
| Senior or certified PM (PMP, IT, construction) | per hour | $100-200 |
| Part-time monthly retainer (20-40 hours) | per month | $2,000-5,500 |
| Project planning and kickoff package | flat fee | $1,500-6,000 |
| Project audit or recovery assessment | flat fee | $2,000-7,500 |
| Scrum master / agile coaching | per hour | $80-170 |
| Day rate for on-site or embedded work | per day | $600-1,400 |
| Status reporting and PMO setup | flat fee | $1,000-4,000 |
Typical US ranges. Rates vary by region, experience, and job size.
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Project management retainer - website redesign (June, up to 30 hrs) | 1 month | $3,000.00 | $3,000.00 |
| Additional hours beyond retainer (vendor coordination, approved in advance) | 6 hours | $105.00 | $630.00 |
| Stakeholder workshop facilitation (June 12) | 3 hours | $105.00 | $315.00 |
| Project management software seat (June, billed at cost) | 1 month | $29.00 | $29.00 |
| Client site visit mileage (round trip, 2 trips) | 84 miles | $0.70 | $58.80 |
| Total | $4,032.80 | ||
Notes: Payment due within 15 days of invoice date. Retainer hours do not roll over. Additional hours beyond the retainer require written approval and are billed at $105 per hour. Late balances accrue 1.5% per month.
Clients often run several projects at once, and accounts payable needs to match the invoice to the correct contract or budget line.
Larger clients often will not process payment without a purchase order number, which delays payment when missing.
Shows what the client paid for, such as planning, vendor management, or reporting, and heads off questions about time.
Makes clear how many hours were included and what was billed above that at the agreed rate.
For milestone-based billing, tying the invoice to a signed-off deliverable supports your right to payment.
Software, travel, and printing costs billed at cost need backup, and many clients require receipts before reimbursing.
Work added after the original scope should point to an approved change order so extra charges are not disputed.
Independent PMs commonly invoice monthly in arrears for retainer and hourly work, with net 15 or net 30 terms. Corporate clients often insist on net 30 or net 45, so confirm this in the contract and add a late fee (1-1.5% per month is typical where permitted) if it is allowed. For fixed-fee projects, a deposit of 25-50% at kickoff is common, with the remainder tied to milestones. Some PMs invoice retainers in advance at the start of each month to protect cash flow. ACH transfer and check are the most common payment methods for business clients, and card payments are accepted by some, though processing fees may apply.
Invoicing the retainer at the start of the month keeps you from financing the client's project. Hours worked beyond the allotment can be billed in arrears.
Logging time under planning, meetings, reporting, and vendor coordination makes your invoice easier to defend and helps you estimate future projects more accurately.
Scope creep is the most common billing dispute in project work. Require an email or signed change order before you start extra work, and reference it on the invoice.
Define what project closeout includes, such as a lessons-learned document and handover of files, so the final invoice is not held up by open-ended requests.
If you pay vendors or buy tools on the client's behalf, list them as separate lines at cost, or decide up front whether you add a handling markup, and say so in the contract.
Hourly suits short or unpredictable work. A retainer works better for ongoing projects because it gives you steady income and gives the client a predictable cost. Many PMs use a retainer with a set hour cap and an overage rate.
Yes. Meetings, reporting, and stakeholder communication are core parts of project management. Make sure your agreement states that time spent on them is billable, and show it on the invoice as its own line or task category.
If the delay is caused by the client, such as late approvals or changed requirements, your agreement should allow you to bill additional time or extend the retainer. Document the cause in writing and raise it before the extra time accumulates.
It depends on the state. Many states do not tax professional or consulting services, but some do tax certain services. Check with your state revenue department or a tax professional for your location.
Bill your own time as a fee, and list vendor costs as separate pass-through lines at cost, or have the vendor bill the client directly. Your contract should say which approach applies and whether you add any markup.
Send a Project Manager estimate for approval, then turn it into an invoice when the work is done.
Project Manager estimate template