Your nurses worked every authorized shift this week, the visits verified cleanly in EVV, and your payroll run still goes out Friday while Medicaid pays you sometime next month — if the claim survives. That timing gap is the whole game in private-duty nursing (PDN): weekly payroll against 40-plus-day collections, with every billed hour gated by a prior authorization that can expire, underpay, or deny without warning. Here is how to keep the books for a PDN agency so cash flow, compliance, and margins all stay visible.
What Makes PDN Bookkeeping Different
Private-duty nursing is continuous, one-on-one skilled nursing in the home — often for medically complex children or adults who need extended hours, sometimes around the clock. Federal Medicaid rules define it at 42 CFR 440.80 as nursing services for beneficiaries who require more individual and continuous care than intermittent skilled visits provide.
That definition shapes your books in three ways:
- Revenue is authorization-driven, not visit-driven. Each client has a prior authorization spelling out approved hours or units over a date span. Hours worked beyond the authorization are generally unbillable, no matter how medically necessary they felt at the bedside.
- Billing is hourly or quarter-hourly. PDN bills on HCPCS codes such as T1000 (private-duty nursing, up to 15 minutes per unit), S9123 (RN nursing care in the home, per hour), and S9124 (LPN nursing care in the home, per hour), depending on the state and payer. Small unit errors compound fast across hundreds of weekly hours.
- Every visit must be electronically verified. Section 12006(a) of the 21st Century Cures Act requires states to use Electronic Visit Verification (EVV) for Medicaid home health services — six data elements per visit, including who provided the service, who received it, what was done, and when and where. A shift missing EVV data is a shift you may not get paid for.
Medicaid Authorizations Are Your Revenue Ceiling
Think of each authorization as a prepaid balance of billable hours. Your bookkeeping should track it like one.
Maintain an authorization ledger per client. For every active auth, record the approved code, approved units or hours, date range, approved rate, units billed to date, and remaining balance. When remaining units hit roughly two weeks of scheduled hours, trigger re-authorization — late renewals create gaps where worked hours fall outside any auth and become write-offs.
Watch the authorized-to-billed ratio. Home care benchmarks put a healthy authorized-to-billed hours ratio at 95 percent or better. Below that, you are either understaffing cases (leaving approved revenue on the table) or working hours you cannot bill. Both show up as margin erosion before they show up anywhere else.
Calendar every expiration. Authorizations end mid-month, on weekends, and during holidays. A simple report — auths expiring in the next 30 days, sorted by weekly revenue at risk — prevents the most common PDN write-off: the nurse kept showing up because the family needed her, and nobody noticed the auth lapsed on Tuesday.
Bill It Right: Codes, Units, and Timely Filing
PDN denials are rarely about medical necessity. They are about units, dates, and mismatched documentation.
Match the code to the nurse and the payer. An RN hour and an LPN hour bill at different rates under different codes (S9123 versus S9124 in states that use them; T1000 with four units per hour where quarter-hour billing applies). Scheduling an LPN on an RN-authorized case — or billing the wrong code for the license level that actually worked — invites denials and, worse, overpayment findings on audit.
Reconcile EVV to the claim before submission. The claim's dates of service, procedure code, and units should agree with EVV records and nursing notes. Build a pre-bill checklist: auth active on each date of service, EVV visit verified, documented hours equal billed units, correct rendering provider identifier. Scrubbing claims before they go out is dramatically cheaper than working denials after.
Respect timely filing limits. Every payer sets a deadline for initial claims — commonly 12 months from the date of service for Medicaid fee-for-service, but managed care plans often allow far less, sometimes 90 to 180 days. Track submission dates in your receivables aging, not just service dates, so a clearinghouse rejection in month five does not quietly age past a six-month limit.
Shift-Level Payroll and the Overtime Traps
Payroll is typically 60 to 70-plus percent of a PDN agency's costs, and it runs weekly while revenue arrives monthly. Precision here protects both cash flow and compliance.
The standard is the 40-hour week. Under the Fair Labor Standards Act, non-exempt nurses earn overtime at one-and-a-half times the regular rate past 40 hours in a workweek. PDN schedules — 12-hour shifts, weekend coverage, on-call hours that turn into worked hours — cross that line routinely. Budget the premium into your bill-rate math rather than discovering it on payday.
The 8-and-80 system is narrow. Section 7(j) of the FLSA lets hospitals and residential care establishments compute overtime over a 14-day period — daily overtime past 8 hours and biweekly overtime past 80 hours — but only under an agreement reached with the employee before the work is performed, and several states restrict or prohibit it. Most home-based PDN agencies do not qualify and should assume the standard 40-hour week applies. Do not adopt 8-and-80 on a payroll vendor's suggestion alone; confirm eligibility with employment counsel first.
Count all hours worked. Time spent traveling between clients during the workday, mandatory training, and on-call time with tight response constraints generally count as compensable hours. Since the 2015 Home Care Rule extended FLSA minimum wage and overtime protections to home care workers employed by third-party agencies, the old assumptions about exempt companions and live-in overtime do not shelter a PDN agency's workforce.
Accrue payroll at month-end. If your pay week straddles the month, book the earned-but-unpaid days as accrued payroll. Without the accrual, months with three paydays look mysteriously unprofitable and months with two look deceptively healthy.
W-2 vs. 1099: Classify Nurses as Employees
Treating field nurses as independent contractors is one of the costliest mistakes a PDN agency can make — and enforcement keeps proving it. In early 2026, a federal court granted the Department of Labor summary judgment against a Pennsylvania home health company that had classified LPNs and home health aides as contractors, holding them to be employees owed back pay. Similar enforcement actions against nurse staffing registries keep reaching the same conclusion: nurses performing the agency's core work, on the agency's schedule, under the agency's supervision, are employees under the economic reality test.
For your books, employee classification means:
- Withholding income tax and FICA, paying employer payroll taxes and unemployment insurance, and carrying workers' compensation on field staff.
- Paying overtime on the regular rate, including non-discretionary bonuses and shift differentials in that rate.
- Issuing W-2s and filing Forms 941 — not 1099s.
Price your contracts for the fully loaded cost of a W-2 workforce. A bill rate that only works with contractor economics is not a viable rate.
Taming Unpaid Claims Receivable
PDN receivables behave like healthcare receivables, not like ordinary customer invoices. Book them accordingly.
Record gross revenue, then contractual adjustments. Bill at your standard rates, then reduce to the payer's contracted or fee-schedule rate through a contractual adjustment account. This keeps two truths visible: what you charged and what the payer allows. Lumping everything into one net number hides denial trends and makes payer negotiations guesswork.
Age receivables by payer, not just by invoice. A consolidated aging report masks everything. Segment it: Medicaid fee-for-service, each managed care plan, commercial insurance, private pay. Each payer has its own payment rhythm and denial personality, and each needs its own follow-up cadence.
Target DSO of 40 to 45 days. Days Sales Outstanding — outstanding receivables divided by average daily revenue — is the headline collections metric for healthcare providers, with 40 to 45 days a common benchmark. Rising DSO with flat revenue means denials or slow payers are accumulating; falling DSO with rising write-offs means the billing team is cleaning the books by giving up. Read the two together.
Work denials by root cause, not one by one. Log every denial with a reason code: no auth on file, auth exhausted, EVV mismatch, untimely filing, wrong code or units, eligibility lapsed. A monthly Pareto of denial reasons tells you whether the fix belongs in intake (eligibility checks), scheduling (auth tracking), or billing (scrubbing) — which is the difference between a process fix and an endless appeal queue.
Reserve for doubtful accounts. Even well-run agencies carry uncollectible balances: lapsed eligibility, bankrupt facilities, aged private-pay accounts. Maintain an allowance for doubtful accounts based on historical collection rates by payer and aging bucket, and review it quarterly. Hope is not a collections strategy.
The KPIs That Run the Business
Pull these monthly, per client as well as agency-wide:
- Gross margin per client: (net revenue minus direct labor cost) divided by net revenue. Healthy home care margins run roughly 30 to 40 percent depending on payer mix; a client below 20 percent deserves a staffing or rate review.
- Bill rate versus pay rate spread: the gap between what the payer allows per hour and the nurse's fully burdened hourly cost (wages plus payroll taxes, benefits, insurance, and overtime premium). The spread must cover overhead and profit — if it does not, no volume of hours fixes it.
- Authorized-to-billed hours ratio: target 95 percent or better, as above.
- DSO and denial rate by payer: collections health, segmented.
- Nurse turnover and overtime percentage: recruiting and premium-pay costs flow straight to the bottom line; agencies that track turnover by tenure cohort spot retention problems while they are still fixable.
Set Up Your Chart of Accounts for Payer Reality
A PDN chart of accounts should mirror how money actually moves:
- Separate revenue accounts by payer class (Medicaid fee-for-service, each managed care organization, commercial, private pay) so payer mix and margin-by-payer fall out of the trial balance.
- Keep contractual adjustments and bad-debt expense as distinct contra-revenue and expense accounts — never net them silently against revenue.
- Break direct labor by role (RN, LPN) and by regular versus overtime wages, so overtime creep is visible without a special report.
- Track prepaid expenses for annual costs like liability insurance and accreditation fees, and accrued liabilities for payroll and earned PTO, so monthly profit is real profit.
Reconcile the authorization ledger to billed revenue every month. If authorized hours, scheduled hours, EVV-verified hours, and billed units do not approximately agree, the gap is either unbilled revenue or unbillable cost — and either way, you want to find it in week one, not at year-end.
Keep Your PDN Finances Organized From Day One
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