A founder whose projects keep slipping has three doors in front of them, and they look nearly identical from the outside. Hire a fractional project manager. Bring in a project consultant. Recruit a full-time PM. They cost different amounts, take different lengths of time to arrange, and solve genuinely different problems. Choosing the wrong one is expensive, either in money or in months lost.
The confusion is fair, because all three involve someone senior helping with projects. But the roles are not variations of the same thing. They are answers to three different questions. Here is how to tell which question you are actually asking.
The Three Roles in One Line Each
A full-time PM is an employee who owns the ongoing running of your projects, day in and day out, indefinitely. Their value is continuity - they are always there, always accountable, embedded in the team.
A fractional PM is an experienced project manager who owns your delivery part-time, on a continuing basis, for a fraction of the cost and commitment of a full-time hire. Their value is senior ownership without a full-time salary or headcount.
A project consultant is an expert brought in to diagnose and fix a specific problem, then leave. Their value is a fixed-scope intervention - they solve the thing, hand it over, and go.
The difference between them is not seniority. It is the shape of the commitment and the nature of the problem. We drew the finer version of one of these distinctions in project manager vs project management consultant.
The Two Questions That Decide It
Before comparing cost, answer two questions.
First: is your problem ongoing or one-off? Do you need someone to keep running delivery every week for the foreseeable future, or do you need someone to fix a broken process and leave you able to run it yourself?
Second: how much project management does your business actually generate? Enough to fill a full-time role, or a serious but part-time amount?
Those two answers place you cleanly. A one-off problem points to a consultant. An ongoing need that does not fill a full-time role points to fractional. An ongoing need that does fill a full-time role points to a permanent hire. Most founders skip these questions and jump straight to "should I hire someone", which is why they so often hire the wrong shape of help.
When a Project Consultant Is Right
Bring in a consultant when the problem is specific, bounded, and solvable. Your delivery process is broken and needs redesigning. You are standing up a project management framework for the first time. A single large project is going sideways and needs rescuing. You need an external diagnosis of why things keep slipping.
The consultant's job is to fix the thing and leave you better able to run it yourself. They are not there to run delivery every week forever - that is not what you are paying for. If you find yourself wanting to keep the consultant on indefinitely to keep things running, that is a signal you did not have a one-off problem. You had an ongoing need, and you should be looking at fractional or full-time instead.
The trap with consultants is hiring one for an ongoing problem. They diagnose, they fix, they leave, and three months later the same drift returns because the underlying need was for continuous ownership, not a one-time intervention.
When a Fractional PM Is Right
Choose a fractional PM when you have an ongoing need for senior delivery ownership, but not enough volume - or budget - to justify a full-time hire. This is the situation most growing IT and services businesses are actually in and do not realise.
You have real projects that need managing every week. Delivery is slipping because nobody senior owns it. But you cannot honestly fill forty hours a week of project management, and a full-time PM salary is a heavy commitment for a business your size. A fractional PM gives you experienced, continuous ownership for the hours you actually need, at a fraction of the cost. We laid out how this works in practice in fractional PM for IT services agencies.
The other case for fractional is speed and risk. A fractional PM starts in days, not the months a full-time hire takes to recruit and onboard. And if the fit is wrong, you adjust the engagement rather than manage an employee exit. For a business that needs delivery under control now, that responsiveness matters.
The fractional model also scales with you. You can increase the engagement as your delivery load grows, and at some point the honest answer becomes "we now have enough work for a full-time PM" - at which point fractional has done its job and bridged you to the permanent hire. We compared the two directly in fractional PM vs full-time PM.
When a Full-Time PM Is Right
Recruit a full-time PM when your project management genuinely fills a full-time role and will keep doing so. You have enough concurrent projects, enough stakeholders, enough day-to-day delivery that someone needs to be embedded in it constantly.
Full-time wins on continuity and depth. An employee who lives inside your business every day builds context, relationships, and institutional knowledge that a part-time or temporary presence cannot match. When the volume justifies it, that depth is worth the cost.
The mistake here is hiring full-time too early - committing to a salary and a headcount for a role you cannot yet fill, then either overpaying for underused capacity or watching a capable person disengage from a job with not enough in it. The volume has to be real and durable before a full-time hire is the right call.
What Each One Costs, Honestly
Cost is where these roles differ most starkly, and comparing them fairly means comparing more than the headline rate.
A full-time PM is the largest commitment: a salary, plus the on-costs of an employee - benefits, tools, management time, and the risk and expense of getting the hire wrong. For a business with the volume to justify it, that cost is well spent. For one without, it is a heavy fixed expense against a role that is not full.
A fractional PM costs a fraction of that, because you pay for the hours you actually use. There is no full-time salary, no long-term employment commitment, and no lengthy recruitment. The rate per hour is higher than an employee's equivalent, but you are buying senior experience at part-time volume, which for most growing businesses works out far cheaper than a full-time hire sitting partly idle.
A project consultant is priced by the engagement - a defined scope for a defined fee. It can look expensive per day, but it is bounded. You are paying for a fix, not an ongoing relationship, and when the fix is done the cost stops. The trap is turning a consultant into a permanent fixture, at which point you are paying premium day rates for what should have been a fractional or full-time arrangement.
The honest way to compare is not rate against rate. It is total cost against the value of the problem solved. A fractional PM at part-time cost that stops your delivery slipping is cheaper than a full-time hire you cannot fill, and far cheaper than the projects you keep losing while you decide.
A Simple Decision Path
Run these in order. Is the problem one-off and bounded? Hire a consultant, get it fixed, move on. Is the need ongoing but below full-time volume, or is budget or speed a constraint? Go fractional. Is the need ongoing and genuinely full-time, with durable volume to fill it? Recruit a full-time PM.
And notice the natural progression: many businesses use a consultant to fix the immediate mess, a fractional PM to own delivery through the growth phase, and a full-time PM once the volume has grown enough to justify it. These are not competing choices so much as stages, and moving through them in order is often the cheapest path.
The Signals You Are In the Wrong Arrangement
Sometimes the clearest way to choose is to notice you have already chosen wrong. A few signals are worth watching for.
If you brought in a consultant and keep extending the engagement month after month, you did not have a one-off problem. You have an ongoing need, and you are paying premium day rates for what should be a fractional or full-time role. If you hired full-time and the person is visibly under-occupied, or has drifted into work well outside project management to stay busy, the volume did not justify the role and a fractional arrangement would have fit better. And if delivery keeps slipping despite everyone being busy, you may have no clear owner at all - the work is spread across people who each touch it but none of whom owns it, which is exactly the gap a fractional or full-time PM is meant to close.
The right arrangement tends to feel quiet. Projects move, decisions get made at the right level, and you are not thinking about project management because someone owns it. When you are constantly aware of the arrangement, it is usually because it does not fit the problem.
The Bottom Line
The three roles answer three questions. A consultant answers "fix this specific thing". A fractional PM answers "own our delivery continuously without a full-time cost". A full-time PM answers "we have enough project management to fill a permanent role". Match the role to the question and each is excellent value. Mismatch them - a consultant for an ongoing need, a full-time hire for volume you do not have - and you pay for it in money or in time.
Decide whether your problem is one-off or ongoing, and whether your volume is full-time or not. The right role follows directly, and asking in that order saves the expensive detour of hiring the wrong kind of help.