Guide

The tax-season folder: collect all year, deliver once

Summary

Your accountant needs four things gathered over the year rather than assembled in April: a categorized income and expense summary, records of every quarterly estimated payment made with dates, documentation of retirement contributions and equipment purchases, and — if your practice is an S corporation — the payroll register. A folder maintained monthly beats a shoebox reconstructed in March: fewer billed hours, fewer missed deductions, a return filed rather than extended.

By Gale Editorial · Updated 2026-07-27. Every figure cited to a dated source. How we write.

What the folder needs, at minimum

Four things make a tax-season folder complete: a categorized income and expense summary pulled from your books, records of every quarterly estimated payment you made with dates and amounts, documentation of retirement contributions and any equipment purchased during the year, and — if your practice is taxed as an S corporation — the payroll register. Everything else is detail underneath these four.

Building this folder in April, from twelve months of bank statements and a shoebox of receipts, is the most expensive way to do your own taxes: your accountant either bills you to reconstruct the year or works from incomplete information and misses deductions you actually earned. A folder maintained monthly turns tax season into a delivery, not a reconstruction project.

The income side: what proves what you actually earned

Your accountant needs a gross-receipts figure that reconciles to your bank deposits, plus every 1099 issued to you — a 1099-NEC from any insurance panel or referral source that paid you as a contractor, and a 1099-K if a payment processor moved more than the reporting threshold in card or ACH payments on your behalf. Self-employed clinicians report this income on Schedule C and pay self-employment tax on the net 1.

If a patient paid by card and the processor's 1099-K total doesn't match what you see in your practice-management system, reconcile the difference before handing over the folder rather than after — the 1099-K reports gross processor volume, which can include refunds and fees your own books already net out.

The expense side: categorized, not a single total

Ordinary and necessary business expenses are deductible — continuing education, licensure and board renewal fees, clinical supervision, malpractice premiums, EHR and billing software, and office costs all qualify — but only if your accountant can see them broken into categories rather than one lump "expenses" figure 2. A category-level breakdown is what lets your accountant catch a missed deduction instead of guessing at your intent from a bank statement.

If you work from home and use a dedicated space regularly and exclusively for the practice, decide before tax season whether you're using the simplified home-office method (a flat rate per square foot, capped) or the actual-expense method, and bring the square footage and expense records that method requires 3. Switching methods year to year is allowed but complicates the folder, so pick one and note why.

Equipment and larger purchases: what triggers depreciation

Anything you bought for the practice that costs more than a routine supply — a new exam table, a laptop, office furniture, diagnostic equipment — needs its own line in the folder: the purchase date, the amount, and the date it was placed in service. The IRS's depreciation guide covers MACRS, the Section 179 election to expense qualifying property immediately up to its annual limit, and bonus depreciation, and your accountant needs the purchase detail to apply whichever produces the better outcome for your year 4.

Keep the invoice or receipt, not just the credit card statement line — the invoice is what substantiates the amount and the date placed in service if the deduction is ever questioned.

Every quarterly estimated payment, with the dates

Self-employed clinicians pay estimated tax in four installments — roughly April, June, September, and January — and your accountant needs the date and amount of each payment actually made, not just what was scheduled, plus which safe harbor you were aiming for: generally 90% of the current year's tax or 100–110% of last year's 5. A payment made late or skipped changes the math for the whole return.

If your payments fell short of either safe harbor, form 2210 is where the underpayment penalty gets calculated — bring your payment dates so your accountant can run that calculation instead of estimating it, since the penalty is based on the shortfall in each period, not just the year-end total.

Retirement contributions and their confirmation paperwork

If you contributed to a SEP-IRA or another retirement plan during the year, bring the contribution confirmations and the dates — a SEP-IRA allows employer contributions up to 25% of compensation within the annual limit, and the deduction depends on the contribution actually landing in the account, not just being planned 6. Contributions made after year-end but before the filing deadline still count for that tax year, which is exactly the kind of timing detail that gets lost without a folder entry.

Note which plan you used and whether you have any employees who would need to be covered under the same plan — a SEP with even one eligible employee has coverage obligations your accountant needs to know about, not discover later.

If you sell products alongside your clinical services

A folder built for a purely clinical practice misses a category if you also sell supplements or devices at the front desk: retail sales carry their own sales-tax mechanics, separate from the income-tax picture the rest of this folder covers, and your accountant needs those sales tracked apart from clinical fee revenue. Mixing the two into one general "income" line makes it harder to apply the right treatment to either.

This is a narrow case — most solo practices have no retail revenue at all — but if yours does, flag it explicitly rather than letting your accountant discover it while reconciling deposits.

Entity-specific additions, and how long to keep all of it

An LLC taxed as a disregarded entity or partnership needs nothing beyond the folder above; an LLC that elected S-corporation status needs more — the payroll register, W-2s, and payroll tax filings — because a shareholder-employee's reasonable compensation has to be documented as W-2 wages before any distribution, and getting that wrong is a common audit trigger. The s-corp math is worth running before you elect, not after.

If your state offers a pass-through entity tax workaround, its election documentation belongs in the folder too. For tax retention, keep the underlying records — receipts, bank statements, the return itself — for at least three years from filing, six years if you substantially underreported income, and four years for anything tied to employment taxes if you have staff 7. That's a different clock than clinical-record retention, and mixing the two up is a common and avoidable confusion.

Common questions

Start with whatever's easiest to pull now — this year's bank statements, your practice-management system's revenue export, and any 1099s already received — and build categories forward from there. Don't try to reconstruct three prior years retroactively; focus the habit on the current year and let your accountant work from whatever documentation exists for past years already filed.

Digital is fine and usually easier to keep organized — a shared drive folder with subfolders for income, expenses, quarterly payments, and retirement contributions works as well as a physical folder, as long as your accountant can access it. What matters is the categorization and completeness, not the medium; a scanned receipt works exactly as well as the paper original for this purpose.

Put it in the folder anyway, flagged as a question, rather than deciding yourself and leaving it out. Ordinary and necessary business expenses are broadly deductible, but the borderline cases — a conference that was partly personal travel, equipment used for both clinical and non-clinical purposes — are exactly what your accountant is there to sort, and they can't sort what they never see.

Yes — your accountant needs it regardless, both to check consistency year over year and to calculate this year's safe-harbor estimated-payment target off last year's liability. If your accountant prepared it themselves they likely already have it on file, but including it removes any doubt and saves a request back to you mid-preparation.

Yes, along with confirmation that you issued the 1099-NEC that payment required if it totaled $600 or more for the year. Your accountant needs to see both the expense you paid the contractor and that you met your own information-return obligation, since a missed 1099 filing carries its own penalty separate from the underlying expense being deductible.

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References

  1. 1.Internal Revenue Service (2026). Self-employed individuals tax center. Internal Revenue Service. link ✓That self-employed clinicians file Schedule C and pay SE tax on net earnings, framing why gross receipts must reconcile to income reported.
  2. 2.Internal Revenue Service (2026). Guide to business expense resources. Internal Revenue Service. link ✓That ordinary and necessary business expenses are deductible, supporting the categorized-expense requirement for the folder.
  3. 3.Internal Revenue Service (2026). Home office deduction. Internal Revenue Service. link ✓That the home-office deduction requires regular and exclusive use and offers a simplified or actual-expense method, supporting what documentation each method needs.
  4. 4.Internal Revenue Service (2026). Publication 946, How To Depreciate Property. Internal Revenue Service. link ✓That equipment purchases fall under MACRS, Section 179, or bonus depreciation, supporting the purchase-documentation requirement for equipment.
  5. 5.Internal Revenue Service (2026). Estimated taxes. Internal Revenue Service. link ✓The quarterly estimated-payment schedule and the 90%/100-110% safe-harbor rules, supporting why payment dates and amounts belong in the folder.
  6. 6.Internal Revenue Service (2026). Simplified Employee Pension plan (SEP). Internal Revenue Service. link ✓SEP-IRA contribution limits and the employee-coverage obligation, supporting the retirement-documentation section.
  7. 7.Internal Revenue Service (2026). Recordkeeping. Internal Revenue Service. link ✓The IRS retention periods (generally 3 years, 6 for substantial underreporting, 4 for employment tax records), supporting the closing retention guidance.

https://www.gale.care/for-providers/bk-tax-season-folder · 7 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.

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