One person's working-out of employment restrictive covenants, written down after a job offer arrived with four paragraphs attached that nobody would explain. Nothing here is legal advice for your situation.
The document that arrives attached to an offer is rarely written as one promise. It is three or four separate promises stacked in a single block of text, and they fail or survive independently, which is why the question people ask first, whether a non-compete is enforceable, almost never has a useful answer. The useful question is narrower. Which sentence is doing the work, which sentence is the one your former employer would have to stand behind in front of a judge, and what would it cost you, in cash and in months, to find out.
Separate the promises before you weigh any of them
Read the block once with a pencil and mark where each obligation starts. There is usually a confidentiality promise, which is the broadest in scope and the least often fought over; a non-solicitation promise covering customers, and sometimes a second one covering employees; and the non-compete itself, which is the only one that stops you from working. They are drafted together and frequently share a defined term, so a definition written for the confidentiality clause ends up governing the non-compete too. That borrowing is where most of the trouble lives, and where most of the leverage does.
Note also whether the paragraph has its own severability language and whether the agreement says a court may rewrite an overbroad term rather than strike it. Some states let a judge narrow a clause to what is reasonable, a practice usually called blue-penciling or reformation; others strike the offending restriction whole. The same sentence can therefore be a nuisance in one state and a dead letter in another, and the choice-of-law paragraph at the end, the one nobody reads, is what decides which treatment you get.
Duration and geography are the easy parts to measure
Length is the first thing anyone looks at because it is the only term that comes with a number. Twelve months reads differently from twenty-four, and a clause that starts running on the last day of employment reads differently from one that starts when the last commission check clears. Check for tolling language, which pauses the clock during any period you were in breach, and which can quietly turn a one-year restriction into two. Check also whether the employer must pay you during the restricted period, since a paid sit-out, sometimes called garden leave, changes the arithmetic entirely.
Geography is drafted one of three ways: a radius from an office, a list of states or counties, or the territory you actually covered. The third is the most defensible for the employer and the most limiting for you, because it follows your own sales records. A radius drawn around a headquarters you visited twice is easier to argue with. If the clause has no geographic limit at all but is tied to named customers instead, that is not a drafting error, it is a deliberate design, and it is often harder to attack than a map.
The definition of competing activity is the sentence that matters
Somewhere in the middle there is a sentence defining the business you may not join, and it is almost always the one that decides the case. Sometimes it names a product line. Sometimes it says any business that competes with any business the company conducts or plans to conduct, which sweeps in divisions you never touched and products that do not exist yet. Then there is the second half, the part specifying your role: whether you are barred from the industry entirely or only from performing the same functions you performed here. A clause that bars you from working as a janitor at a competitor is the kind of overreach courts notice.
So read that sentence against your resume rather than against the market. Write down the actual job you are being offered, the accounts it touches, the territory it covers, and then ask whether the definition reaches it without strain. If it takes three inferences to get there, you are in argument territory. If it names your exact title and your exact customers, the argument is about reasonableness, not coverage, and the strategy changes.
What finding out actually costs
Enforcement does not usually arrive as a lawsuit that ends in a verdict. It arrives as a letter to your new employer, and the practical damage is done in the week the new employer spends deciding whether you are worth the distraction. If the matter proceeds, the fight is over a temporary restraining order and then a preliminary injunction, both of which move fast, both of which require your lawyer to prepare on a compressed schedule, and neither of which decides the merits. A few hours with a non compete agreement lawyer before you resign costs a fraction of one week of that, and usually produces a clear answer about which sentence is exposed.
Price the other terms too. Look for a fee-shifting provision making you pay the company's legal costs if it prevails, for a forfeiture clause that claws back unvested equity or a signing bonus, and for a liquidated damages figure. Those numbers determine your real exposure far more than the non-compete's odds of surviving. The Federal Trade Commission has taken an active interest in how these restrictions operate in the labor market, and the legal landscape has moved in several states, which is one more reason to check the current rule rather than the one you remember.
Mark the four promises, find the definition sentence, then total the money at risk if you are wrong. That is a two-hour exercise with a pencil, and it turns an unreadable block of text into a short list of specific questions worth paying someone to answer.