I Work on Commission. How Does a Lender Calculate My Income?

The short answer: it depends almost entirely on whether your commission comes on a W-2 or a 1099, and most people do not know that is the dividing line. W-2 commission is variable income with a documented history, averaged and checked for trend. 1099 commission is generally treated as self-employment, which is a materially different file — and the difference that catches people is that your business deductions reduce your qualifying income dollar for dollar.

That is the sentence worth reading twice if you are a real estate agent, an insurance producer, a mortgage originator, or any kind of commissioned salesperson filing a Schedule C: the tax strategy that saves you money in April is the same strategy that shrinks your house in June.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996. I have watched a lot of people who sell real estate struggle to document their own income, which is a particular kind of frustrating, and it is almost always avoidable with a year's notice.

The dividing line: W-2 or 1099

W-2 commission. You are an employee, taxes are withheld, and the commission shows on your W-2. Underwriting treats it as variable income: a documented history, generally around two years, averaged rather than taken at the current rate, with a check on whether it is trending down. That machinery is the same one that governs overtime and bonus income, and the details there apply here.

1099 commission. You are not an employee. You receive gross commissions, you pay your own taxes, and you file a Schedule C or through an entity. Underwriting generally treats this as self-employment, which changes the whole shape of the file — different documentation, different calculation, and the deduction problem below. How a self-employed file actually gets read is the fuller picture.

Plenty of people genuinely do not know which one they are until they look. Look before you plan anything.

The deduction problem, which is the whole article for 1099 earners

Your qualifying income is not your gross commissions. It is roughly what is left after the expenses you deducted.

Mileage. Home office. Marketing and signage. Meals. Dues, licensing, CRM subscriptions. Every one of those lowered your taxable income, which was the point — and every one of them also lowered the income figure an underwriter can use.

A producer who grossed $180,000 and deducted aggressively down to $95,000 does not present as a $180,000 earner. They present as something near $95,000, because that is what the return says they earned — and since debt ratio is what actually limits most buyers, that difference lands straight in the price range.

Some of it comes back. Depreciation is added back — it reduced taxable income without money leaving your account. Certain documented one-time, non-recurring expenses can be too. But ordinary operating costs are ordinary operating costs, and they stay deducted.

None of this is an argument for paying more tax than you owe. It is an argument for knowing the trade before you make it, because most people make it without knowing there was a trade at all.

Why a bad year hurts commission earners more

When commission sits on top of a salary, a soft year trims the extra. When commission is the income, a soft year is the whole picture.

Averaging over two years softens it, and a declining trend is still a real problem — the calculation generally will not use a higher prior year just because it exists. For someone whose entire income is production-based, that means the market's bad year becomes your qualifying problem eighteen months later.

The practical consequence is about timing, and it is the one lever you control: a strong year that has been filed is an asset. A strong year that has not been filed yet is not much of one. If you are planning to buy and you have just finished a good year, filing on time rather than extending is worth real money.

Changing brokerages, changing companies

This worries commissioned people more than it should.

What matters most is continuity in the same line of work, not the same employer. An agent who moves from one brokerage to another is generally still an agent with a continuous production history. A producer who leaves sales entirely for a salaried role has changed something much more fundamental.

Document the move, keep the history clean, and it is usually a non-event.

The mistakes I see

• Maximizing deductions in the year before buying. The single most expensive one, and it is completely invisible until the file is being calculated.
• Assuming gross commissions are the number. They are not, on a 1099. They are the starting point.
• Not knowing whether you are W-2 or 1099. Two very different files.
• Extending the tax return while trying to buy. A strong year that is not filed cannot do much work for you.
• Applying immediately after leaving production income for salary, without pricing what that does. Sometimes it helps; sometimes two years of history evaporates.
• Waiting until the pre-approval to have this conversation. For a 1099 earner, the useful conversation happens before the return is filed, not after.

An illustration, so the shape is clear

Numbers below are invented to show the mechanism, not a quote.

Two agents each gross $150,000 in commissions. Same production, same market, same year.

The first deducts carefully but conservatively, and lands at roughly $110,000 of net income on the return.

The second deducts everything defensible — a heavier mileage log, a home office, more of the marketing — and lands near $78,000.

The second agent saved real money on taxes. They also present to underwriting as a considerably smaller earner, and the price range that follows is smaller in proportion. Depreciation gets added back on both files and does not close the gap, because most of what separated them was ordinary operating expense.

Neither one did anything wrong. Only one of them knew a trade was being made.

What to do now

If you are on 1099 commission and you intend to buy in the next couple of years, have the conversation before you file, not after. That is the whole play. Bring last year's return and a rough picture of this year, and the arithmetic on what a given deduction strategy costs you in buying power takes very little time.

If you are on W-2 commission, bring two years of W-2s and a recent pay stub and the calculation is straightforward.

Either way, run your scenario first — no credit pull, no account, nobody calls you — so you know what payment you are actually aiming at before we work backwards to the income that supports it. What a real pre-approval involves is the same either way; only the income arithmetic differs.

Nothing here is a loan approval, a denial, or a commitment to lend, and none of it is tax advice — your accountant owns that side. Program guidelines differ and change, and what applies to a specific file is worth confirming rather than assuming.

Common questions

How do lenders calculate commission income?

It depends on how the commission is paid. W-2 commission is treated as variable income: a documented history of generally around two years, averaged rather than taken at the current rate, with a check on whether it is declining. Commission paid on a 1099 is generally treated as self-employment income and calculated from the tax return after business deductions, which is a substantially different process.

Do my business write-offs hurt my mortgage application?

If you are a 1099 or self-employed commission earner, yes — directly. Qualifying income is calculated from what remains after your deducted expenses, so the deductions that lower your tax bill also lower the income an underwriter can use. Depreciation and certain documented non-recurring expenses are typically added back, but ordinary operating costs are not. It is a real trade-off, and it is worth understanding before the return is filed rather than after.

Can real estate agents get a mortgage?

Yes, and the process is the same one that applies to any commissioned or self-employed client. The friction agents run into is usually the deduction question above, combined with income that varies year to year. Both are manageable with a little lead time, which is why the useful conversation happens before the tax return is filed.

How long do I need to be on commission to qualify?

Generally around two years of documented history, with the exact look-back and the exceptions varying by loan program. What tends to matter more than the calendar is continuity in the same line of work — moving between brokerages or employers within the same field is usually a non-event, while leaving production income entirely is a more significant change.

What if my commission income went down this year?

A decline is treated seriously, particularly when commission is your whole income rather than a supplement. The calculation generally will not use a higher prior year simply because it exists, and a steep enough drop can mean the lower figure governs. If your production has softened, that is a reason to get the numbers looked at sooner rather than waiting for the trend to deepen.

Should I file my taxes before applying for a mortgage?

If you had a strong year, usually yes. A good year that has been filed can be used; a good year sitting on an extension does far less work for you. Timing the filing around a purchase is one of the few genuinely controllable levers a commissioned earner has, and it is worth coordinating with your accountant rather than deciding alone.