Whether to hire an in-house designer or use an agency comes down to one honest question most teams answer wrong: how much steady marketing design work do you actually have. If you can fill a person's week, every week, with work that sits in one lane, an in-house hire is the better buy. If the work arrives in bursts, spans brand and web and campaigns, or needs senior judgement only now and then, an agency or studio usually costs less and delivers more. Most small and mid teams overestimate how much steady work they have, and hire a full-time designer a year before they need one.
Start with what an in-house designer really costs, because the salary is the smallest part of it. A mid-weight marketing designer earns into the mid five figures a year, more in a big city or at senior level. On top of that you carry the things nobody quotes you: the software and font licences, the recruiting to find them, the kit, and the management time to brief and review their work. Add it up and the true cost of a seat lands well above the salary line, and that is before they have made a single thing. A quiet extra cost comes with it too. One hire is one person, with one skill set and one taste, and no one to catch it when either drifts.
What that hire buys you, when the volume is there, is availability and context. Someone in the room who knows the product, turns work round the same day, sits in the meetings, and carries the brand until applying it is second nature. For high, steady output, nobody beats a good in-house designer on cost per asset or on speed. The catch is range. A designer who is brilliant at social graphics is often not the person to redraw your brand or build your site, because those are different jobs that happen to share a job title.
An agency or studio buys you the opposite: range and senior judgement without a full-time salary attached to it. You get a group of people, one who thinks in brand, one who builds, one who art-directs, and you dip into whichever the work needs instead of hoping your one hire covers all of it. You pay more per hour and, when the work is lumpy, less per year. You also get a second opinion built in, which the team of one never has. The trade is that you are not first in the queue and you have to brief people who are not in your standups, so the relationship needs running.
Most teams that get this right end up with a mix, and it is worth naming because it is the answer people arrive at slowly and expensively. A junior or mid designer in-house handles the daily volume, the posts and slides and endless resizing, and a studio is kept on call for the work that sets the direction, the brand, the website, the campaign or launch that has to land. The costly mistake is getting that split backwards: paying a senior full-time salary to resize banners, or inventing your own brand from a blank page to dodge a fee and living with the result for years.
So how do you tell which side you are on before you commit. Count the hours honestly. If you cannot point to twenty or more hours of real design work a week that will still exist in six months, you do not have a full-time role, you have a part-time one you are about to overpay for with a salary. Then look at range. If it is a lot of one kind of thing, a hire makes sense. If it is a little of everything, or the work that matters most is the occasional piece that has to be right, that is a studio's shape, not an employee's.
Before you write the job advert or sign the retainer, put two things on paper: the honest weekly hours of design work that will still be there in six months, and the spread of skills it actually needs. A lot of one thing points to a hire. Some of everything, or a few things that simply have to be right, points to a studio. And if you cannot tell yet, lean to the studio first, because a retainer you can end in a month is a far cheaper thing to be wrong about than a full-time hire you have to let go.