Factor #2 of the IRS Hobby Loss Test: Do You Know the Business, Not Just the Breed?
The IRS doesn’t ask how good you are with dogs or cats — it asks how good you are with numbers.
If you read our last post, you already know what’s on the line. Under Section 183 — the “Hobby Loss Rule” — an activity the IRS classifies as a hobby can’t deduct its losses at all. And since the One Big Beautiful Bill Act locked in the 2018 suspension of miscellaneous itemized deductions permanently, that’s no longer a matter of losing a deduction on a schedule you rarely use — hobby expenses are gone entirely. All gross revenue of stud fee income, every puppy or kitten sale, gets taxed. The only allowance may be reducing cost of goods sold from gross receipts to arrive at gross income. That’s the reason the nine factors in Treasury Regulation § 1.183-2(b) carry so much weight: they’re the roadmap the IRS uses to decide whether your breeding program is a business worth deducting, or a hobby that gets none of the breaks.
Today’s factor is Factor #2: the expertise of the taxpayer or the taxpayer’s advisors. On paper it sounds like it should be an easy win for most breeders — after all, you’ve spent years mastering genetics, temperament, structure, and whelping. In practice, this is one of the factors breeders most often lose, because the expertise the regulation cares about isn’t the expertise most breeders have.
What “Expertise” Actually Means to an Examiner
Treasury Regulation § 1.183-2(b)(2) asks whether the taxpayer, or people the taxpayer consulted, studied the accepted business, economic, and scientific practices of the activity — and then conducted the activity in accordance with what was learned. Notice what’s doing the work in that sentence: it isn’t “studied the breed.” It’s studied the business.
An examiner reading your file is looking for evidence that you invested time in understanding things like: how to price a litter so it actually covers your real costs, what margin you need to stay profitable after health testing and vet care, how to structure the activity for tax purposes, what licensing and compliance obligations apply, and how a program like yours is supposed to be run as an economic enterprise. That’s a genuinely different body of knowledge than genetics and whelping, and the regulation draws the line sharply. Deep expertise in the craft of breeding, on its own, tells an examiner you’re a good breeder. It doesn’t tell them you’re running a business.
The good news is that the regulation gives you two paths to satisfy this factor, and you don’t have to become an accountant to walk either one.
Path #1 – The first path is your own study — courses, books, seminars, or programs focused on the business and financial side of a breeding operation. For example, the Breeder Biz Advisor membership! Very affordable!
Path #2 – The second path is consulting with advisors who understand that side and then actually following their guidance. For example, engaging a CPA or attorney to get you on the right track. Relatively quick, but can get expensive quickly.
Both count. If you’ve sat down with a tax professional or business advisor who specializes in breeding programs, and you’ve implemented what they told you, that consultation is itself evidence for this factor — even if you never took a single business class yourself. What the IRS wants to see is that somebody with real financial understanding was involved in how the activity was run, and that their input shaped your decisions.
Why Breeders Commonly Get This Factor Wrong
The mistake here isn’t laziness — it’s a mismatch between where breeders naturally invest their learning and where the regulation is actually looking. Most breeders who take their programs seriously pour enormous energy into continuing education: health testing protocols, structure and movement, genetics and pedigree research, whelping and neonatal care, breed standards. That’s real expertise, hard-won, and it matters enormously to the quality of your program. It just isn’t the expertise Factor #2 is measuring.
When an examiner looks at a breeder’s file and sees years of seminars on hip dysplasia panels and color genetics but nothing that touches pricing strategy, cost accounting, or tax structure, the conclusion they draw isn’t “this person is unqualified.” It’s “this person studied the craft they love and never studied the business they’re claiming to run for profit.” That distinction can be the difference between a factor that helps your case and one that quietly works against it.
The second common trap is treating a single meeting with an accountant at tax time as sufficient. A once-a-year conversation about which forms to file is not the same as ongoing consultation about how to run the program profitably, and examiners can generally tell the difference. What strengthens this factor is a pattern — evidence that you sought out and applied guidance over time, not a single receipt for tax prep.
Your Action Step: Run a One-Week Business Knowledge Sprint
You don’t need a degree in accounting to move the needle on this factor. You need to start building a dated record that shows you’re actively closing the gap between your breed expertise and your business expertise. Here’s how to do it this week, entirely on your own:
1. Pull together your real per-litter cost breakdown. For your most recent litter, add up every cost that went into it — stud fee, prenatal and whelping vet care, health testing, feed and supplements during pregnancy and nursing, registration fees, and any supplies specific to that litter. Most breeders have never actually done this math in one place. Seeing the real number is the starting point for understanding your own economics.
2. Read one credible resource on small-business pricing or margins. It doesn’t need to be breeding-specific. A solid article, book chapter, or short course on how small businesses set prices and calculate margin will give you a framework to apply to the numbers you just pulled together. The point isn’t to become an expert in one sitting — it’s to be able to show, if asked, that you deliberately studied this. Save this information in a file, whether hard copy in a file cabinet, or electronically in your document storage system. Create a folder for Continuing Education and save it all here.
3. Write down two specific business knowledge gaps you’ll address this quarter — and date it. Be concrete: maybe you don’t understand how to structure pricing across different litters, or you’ve never looked at whether your program should be an LLC, or you don’t know what expenses you’re allowed to deduct. Then note, in one or two sentences, what you did this week to start closing each gap — a resource you read, a question you’re bringing to an advisor, a call you scheduled. Use an inexpensive spiral bound notebook from a discount store, it doesn’t have to be fancy.
Do this once and you have a dated entry. Do it consistently — even quarterly — and you’re building what we call an “expertise trail”: a running, time-stamped record that shows you actively sought out business knowledge, not just breed knowledge. That trail is exactly the kind of evidence Factor #2 rewards, and it costs you nothing but a focused afternoon.
Where Breeder Biz Advisor Comes In
That sprint is a real step forward, and you’re welcome to stop right there. But building genuine, sustained business expertise — the kind that holds up across all nine factors, not just this one — takes more than a single afternoon of self-study. That’s the gap Breeder Biz Advisor exists to close: financial education built specifically around breeding programs rather than generic small-business advice, access to a CPA advisor who actually understand how a kennel or cattery’s finances work, ready-made templates so you’re not building your cost breakdowns and pricing models from scratch, and a community of breeders working through this exact learning curve alongside you. It’s the difference between studying on your own and having a system — and people — behind you.
Founding member pricing is currently available while we continue building out the full library, and it won’t stay open indefinitely.
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This article is general educational information, not tax or legal advice for your specific situation. Section 183 determinations depend heavily on individual facts. Please consult a qualified tax professional about your breeding program.
