DIY tax software is genuinely good now, and for a lot of businesses it is the right call. The mistake is not using software. The mistake is staying on it about two years past the point where it starts quietly costing more than it saves. Here is an honest look at where the line actually sits.
| DIY tax software | Small business tax accountant | |
|---|---|---|
| Cost | Low, flat annual fee | Higher, but scaled to complexity |
| Best for | Simple returns, single entity, W-2-like income | Multi-entity, multi-state, growing profit |
| What it does | Files accurately from what you enter | Plans before year-end and files |
| Entity strategy | None. It uses the structure you already have | Reviews and changes structure to cut tax |
| QBI optimization | Applies it if it fits your entries | Structures compensation to maximize it |
| Deduction discovery | Only what you know to enter | Finds what you didn't know to ask about |
| Timing | After the year closes | Throughout the year, before deadlines |
The pattern that matters is in the bottom rows. Software is a compliance tool. It takes what you give it and files an accurate return. It cannot tell you that you should have elected S-corp status in March, or that your compensation split is shrinking your QBI deduction, or that a purchase timed differently would have moved a deduction into a better year. It does not know your plans, because you cannot type your plans into a form.
So here is the practical threshold. You have probably outgrown software when any of these is true: your business profit is comfortably into six figures, you operate in more than one state, you have more than one entity, or you are making decisions this year, hiring, buying, expanding, that have tax consequences you are not sure how to handle. At that point the software is still filing correctly. It is just leaving strategy on the table, and strategy is where the real money is once you are past the simple stage.
There is a version of this that is not either-or, too. Plenty of owners keep using software for the mechanical filing and bring in an accountant for the planning layer, the part software structurally cannot do. What you do not want is to let a $100 tool make $10,000 decisions by default.
If you are not sure which side of the line you are on, that is a thirty-minute conversation, not a leap of faith. HYON Q will tell you straight whether you have outgrown DIY or not. https://www.hyonq.com/book-consultation