Becoming a Tree Doctor in Your 50s — The Reality of Eligibility, Pass Rates, and Income

Bottom line. The “tree doctor” (namu-uisa, Korea’s licensed tree-care physician) is often floated as a “second life” option for people in their 50s and retirees, but the real gateway is not obtaining the license — it is the exam pass rate stuck in the 10–20% range and the wide spread of income after qualifying. Before pouring money and time into training-institute courses, this is a credential where you must first calculate whether you meet the eligibility requirements, how many years you can hold out until passing, and whether you’ll be employed or open your own practice afterward.

Why the tree doctor holds an “exclusive right to diagnose”

The tree doctor is a national professional certification grounded in Korea’s Forest Protection Act. It took effect in June 2018, and its core lies in an exclusive scope of work. Diagnosing, prescribing for, and treating pests and diseases of “living-zone trees” — those in apartment complexes, schools, and parks where people come and go — is, in principle, permitted only to tree doctors (or tree hospitals that employ them). The aim is to end the past practice of non-experts spraying pesticides and to professionalize tree care like medicine.

For reference, “tree doctor” is not a metaphor but a legal title. Anyone without the license who impersonates a tree doctor or treats living-zone trees without qualification is subject to sanction. That is how much both the title and the work are protected by law as a professional credential.

The weight of the license differs precisely because of this exclusivity. General landscaping and garden maintenance can be done without a license, but the very acts of “diagnosing and prescribing” are bound as the tree doctor’s exclusive domain. So there is an expectation that as urban green space grows and demand for managing street trees and protected trees rises, the value of the credential climbs.

The base of demand is also broadening. Local-government budgets for street-tree management, apartment reconstruction and landscaping remodeling, the expansion of the forestry and garden industries, and responses to pests and diseases spreading with climate change all overlap, increasing the need for “someone who can diagnose.” Whether that demand translates directly into individual income, however, is a separate matter. The number of credential holders is also rising, so it is premature to conclude that supply is scarce just from the word “exclusive.”

Eligibility — not everyone can even press the “apply” button

The first thing to check is “am I a person who can even sit the exam?” The Forest Protection Act’s enforcement decree divides eligibility by degree and career criteria, and the representative paths are as follows.

In other words, the qualifying exam is not “an exam anyone can take by just studying”; it has a structure that first requires an entry ticket of education or career. The preparation difficulty is completely different for someone who already holds this ticket versus someone who must build it from now, so sorting out which side you are on is the starting point of preparation.

If you’re in your 50s from a humanities background with no related career at all, you often have to first walk a “prerequisite track” before applying. Building the eligibility itself — by completing a related major through the Academic Credit Bank System, obtaining an industrial-engineer qualification, and so on — can take 1–2 years. On top of this, even those who meet the eligibility must complete 150 hours of education at a training institute before they can finally enter the exam hall. Completing the education is a mandatory gateway with no exceptions.

The scope of a “tree-care-related major” also needs to be checked in advance. Forest resources, forest science, landscaping, horticulture, and plant-medicine fields are generally included, but detailed recognition can vary by the department’s curriculum and completed subjects. Some non-related majors choose the path of building a related degree through the Academic Credit Bank System, but since this method requires meeting recognized-subject and credit requirements up front, it is safer to always cross-check the eligibility pre-screening criteria before starting. There really are cases where people pay for education first, having misunderstood the eligibility requirements, only to be blocked at the application stage.

Pass rate — the real wall is the exam

The reason the tree doctor is called “hard” lies in the low pass rate. You must pass both the written test (Stage 1) and the practical/interview (Stage 2), and the per-session pass rate often stays around 20%.

Multiply the two stages and the actual final pass probability drops further, because the structure has 1 in 5 clearing Stage 1, and then again 1 in 5 of those passers clearing the final gate. In the early sessions the final pass rate even fell to single digits. Below is a one-glance view of the difficulty of each gate.

※ The third bar above is a conceptual estimate simply multiplying the Stage 1 and Stage 2 pass rates; the actual value varies by session and by the composition of repeat applicants. Confirmed statistics should be checked in the Korea Forestry Promotion Institute’s notices.

The exam is also hard because of its subject makeup. The Stage 1 written test draws broadly from five subjects — tree pathology, tree entomology, tree physiology, forest soil science, and tree management — and failing even one subject means overall failure. On top of this, Stage 2 is a practical and interview dealing with tree specimens and field situations, hard to clear by memorization alone. The sheer volume of learning is considerable, making it an exam that candidates juggling a job find hard to pass in a short time.

Tuition and duration — how much do you put in, and how long do you wait?

Training-institute education is composed of about 150 hours in total, including 130 required hours. It is a structure of theory lectures plus practice, and tuition differs by institute. Recently disclosed tuition by institute was generally in the range of 1.8–2.0 million won.

The cost easily overlooked here is “time.” The 2 million won tuition is visible, but add the prerequisite learning period to build eligibility, the several months to digest 150 hours of education, and the period of retrying 2–3 times because of the low pass rate, and it commonly takes 2–4 years to qualify. Below is a view of the total cost of qualifying along the time axis.

Income after qualifying — the “hundred-million” figure is business income, not a salary

Once you qualify, the income structure splits by where you go. There are broadly three branches.

What matters is not the “average” of the three paths but which slot you can actually stand in. Even with the same license, the income gap between the employed and the self-opened is large, and success or failure diverges even among the self-opened, so transposing someone else’s success story into your own expectation throws the calculation off.

The commonly circulated “tree doctor with a hundred-million-won salary” is, in most cases, not an employed salary but business income after opening a practice. Opening a practice does not happen on the license alone — it must go together with sales ability to win orders, networks with local governments and apartment management, and initial equipment investment. Conversely, starting as an employee begins in a band not much different from other post-retirement jobs. The key point is that “license = high income” does not hold automatically.

If you have opening a practice in mind, you must also factor in initial investment and fixed costs. Diagnostic equipment, a vehicle, an office, tree-hospital registration requirements, and initial promotion costs are incurred, and you need operating funds to hold out through the gap before orders stabilize. If you’re breaking into retirement funds to put into opening a practice, the order is to first set your payback period and loss limit. Conversely, to lower risk, a step-by-step approach is sound: build field experience and a network through tree-hospital employment, then judge whether to open a practice.

2026: what’s changing

If you’re preparing for the system, you should keep track of the latest schedule and changes in the administering body. Stage 1 of the 12th tree doctor qualifying exam in 2026 will be held on Saturday, February 28 in five cities nationwide — Seoul, Busan, Daegu, Gwangju, and Daejeon — and the Stage 1 results announcement was notified for Friday, April 17. Application and confirmation take place at the tree-care specialist website (namudr.kofpi.or.kr).

The administering body is also changing. The tree doctor exam operations that the Korea Forestry Promotion Institute had handled are scheduled to be transferred to the Korea Forest Disaster and Safety Technology Corporation as of February 1, 2026. Since the notice issuer and website guidance may change, at the time of application you should re-check the latest version of notices from the Korea Forest Service and the administering body.

Is it a realistic choice for people in their 50s and retirees?

The judgment splits by your own situation. To sum up: if you already have a related major or career, you skip the eligibility gate and can focus on exam preparation, so it’s relatively advantageous. Conversely, with a complete lack of career and a non-related major, it can take several years from building prerequisites to qualifying, so it’s hard to see as a “quick second job.”

Physical fitness and fieldwork are also variables. Tree care has a strong field-job character — ladder and elevated work, frequent outdoor movement. If you’ve worked long in a desk job, it’s safer to gauge in advance the gap between the credential’s appeal and the actual labor intensity. It’s realistic to set the “entry employed salary” as your baseline for income expectations, and to add practice income only after confirming that your sales work.

You also have to account for the “income gap” during preparation. You must design together whether you can hold out through a stretch of several years with little income while learning and exam costs go out, and how you’ll cover health-insurance premiums and living expenses in the meantime. The intensity of preparation needed differs completely depending on whether you view the credential as “a hobby and pastime in old age” or as “a real income source.”

Frequently asked questions

Q1. Can someone in their 50s with a non-major, no-career background become a tree doctor?
It’s not impossible under the system. But you must first build eligibility (a degree or career, national technical qualification, etc.), and then complete 150 hours of training-institute education before you can sit the exam. It’s right to plan on the premise of a lengthened preparation period.

Q2. Besides tuition, what should I budget as the total cost?
Training-institute tuition is roughly 1.8–2.0 million won, but the cost of building prerequisites, materials and exam fees, and the time spent on retries are often the bigger real cost. You should first weigh how many “years” you can put in, more than the cash.

Q3. How does a tree doctor differ from a tree treatment technician?
The tree treatment technician (sumok-chiryo-gisulja) is a lower-tier qualification than the tree doctor, closer to assisting and carrying out the tree doctor’s diagnosis and prescription. Its application/education requirements and scope of work differ, and some use it as a prerequisite track toward the tree doctor.

Q4. The pass rate is low — can you pass by self-study alone?
Since completing training-institute education is itself mandatory, sitting the exam by pure self-study alone is impossible. After completing the education, preparation for the written and practical tests is reinforced by individual study, and given the low pass rate, it’s common to plan on multiple attempts.

Q5. Can I reduce tuition with government support or the Tomorrow Learning Card?
Some institutes and courses are eligible for support such as the Ministry of Employment and Labor’s account-based training, but whether it applies varies by course, year, and individual requirements. Rather than planning on the premise of support, it’s safer to conservatively set your self-payment for the non-supported case (roughly 1.8–2.0 million won) as the baseline, and treat any support as a reduction if it comes through.

Closing — calculation first, romance second

The tree doctor is a credential with clear appeal — an exclusive right to diagnose and growing demand. But it is not a job you start “comfortably after retirement.” Before acting, I recommend confirming three things in numbers. First, eligibility — whether you can sit the exam now, or whether it takes several years to build. Second, the period you can hold out until passing — whether you can bear 2–3 attempts on the premise of a 20%-range pass rate. Third, the path after qualifying — whether you start from an entry salary, or have the sales assets to go all the way to opening a practice. When these three numbers align, the tree doctor becomes a good second-life card. The final judgment and the timing of starting are your own.

This article was automatically translated from Korean by AI. Please refer to the Korean original for the most accurate content.