Gas station year-end closing checklist for independent operators.

Why year-end closing matters more for gas stations

Year-end closing for a gas station or c-store is harder than for most small businesses because the categories are regulated. Fuel sales have separate excise tax, sales tax, environmental fees, and (in some states) low-carbon adjustments. Lottery commissions reconcile to a state commission report, not a private ledger. Tobacco sales have Master Settlement Agreement implications for some brands.

The CPA can't do this work without source data from the operator. The seven packages below are what makes the difference between a clean tax-season handoff and a series of email follow-ups stretching into March.

Package 1: full-year P&L

Profit and loss for the calendar year (Jan 1 – Dec 31) or fiscal year if you elected one. Should break out:

• Revenue by category (fuel, inside-store, lottery, ATM, other).
• COGS by category.
• Operating expenses by category (10+ standard c-store categories).
• Depreciation if applicable.
• Other income (rebates, vendor allowances, interest).
• Net income before tax.

Export from QuickBooks or your accounting platform with the calendar-year filter. If categories are mis-mapped, fix them before exporting, the CPA shouldn't be re-categorizing transactions.

Package 2: balance sheet as of December 31

Standard balance sheet:

• Cash on hand (drawer + safe at year-end, plus all bank accounts).
• Inventory at cost (post the year-end count adjustment).
• Fixed assets (POS, dispensers, ATG, signage, refrigeration).
• Accumulated depreciation.
• Accounts receivable and accounts payable.
• Loans and notes payable.
• Owner's equity.

Reconcile cash on hand against the safe count on Dec 31 and the bank-account balances on the same date. Inventory at cost should reflect the year-end count, not the running estimate.

Package 3: vendor 1099 source data

Federal law requires 1099-NEC filings for unincorporated vendors paid $600 or more during the calendar year for non-employee compensation. Common gas station vendors that qualify: plumbers, electricians, HVAC contractors, landscapers, sign repair, IT consultants, marketing contractors, accountants if structured as sole props.

The data needed per vendor:

• Legal name (from W-9 collected during the year).
• Tax ID (EIN or SSN from W-9).
• Address.
• Total paid during the calendar year.
• Type of compensation (typically Box 1. Nonemployee compensation).

Filing deadline: January 31. Late filing penalties compound: $60 per form if filed up to 30 days late, $130 if 31+ days late, $330 if after August 1. Get the W-9s collected during the year, not in January.

Package 4: lottery commission reconciliation

Annual commission earned from the state lottery (your commission rate × total lottery sales) should reconcile against:

• The state commission's annual settlement report.
• Your tracked sales (per pack, per draw game).
• The bank credits received throughout the year.

Variances surface here at year-end if they weren't caught monthly. Reconcile against the commission's report before submitting to the CPA, disputed amounts flow through 1099-MISC reporting from the state, and the IRS expects your books to match what the state reports.

Package 5: sales-tax annual summary

Most states require quarterly sales-tax filings; some require monthly. The annual summary aggregates:

• Gross taxable sales by category.
• Sales tax collected.
• Sales tax remitted (per quarterly filings).
• Variance between collected and remitted (should be zero or very small).
• Exempt sales documentation (food stamps / EBT, prescription, resale).

Pre-reconcile any variance before December 31. If you owe additional tax for any quarter, file an amended return before year-end so the books close cleanly.

Package 6: fuel-tax annual schedule

Fuel tax is the most complex single category. The annual schedule covers:

• Total gallons sold by grade (regular, mid, premium, diesel, DEF).
• Federal excise tax collected ($0.184/gal gasoline, $0.244/gal diesel).
• State excise tax collected (state-specific rates).
• State sales tax on diesel (where applicable).
• Environmental fees (UST, oil spill, where applicable).
• LCFS / cap-and-trade adjustments (California operators).
• IFTA reporting for fleet customers if you sold fuel cards.

Reconcile against quarterly filings; resolve any variance before year-end. The fuel-tax pipeline is audit-sensitive; clean records here save the most CPA time.

Package 7: audit trail log

Year-end isn't complete without the underlying audit trail being preserved. Export:

• Daily close audit rows for every shift (variance, reason code, clerk).
• Vendor invoice approval log (who approved, when, with what cost-change flags).
• Inventory adjustment log (write-offs, transfers, corrections).
• Lottery pack lifecycle (activation, sales, settlement).
• Bank deposit reconciliation log.
• Any over-tolerance variance resolutions.

Retention: 7 years minimum for IRS audit purposes. Some records (fuel tax, environmental compliance) extend longer. Lottery commission records often require 5+ years per state regulations. Cloud-stored audit logs are ideal; physical paper logs should be scanned and retained digitally.

December checklist (start before year-end)

1. Confirm vendor 1099 list (W-9s collected; flag missing).
2. Schedule year-end inventory count (typically Dec 30–31).
3. Reconcile any open invoice disputes (write off or apply).
4. Process all pending refunds and rebates.
5. Pre-reconcile sales-tax and fuel-tax variances against quarterly filings.
6. Reconcile lottery commission against state settlement reports.
7. Verify equipment inventory list and depreciation schedule with CPA.
8. Document any planned year-end charitable contributions.

January checklist (close it out)

1. Final EOD on December 31, include the year-end inventory count.
2. Export all seven packages to the CPA by January 15.
3. File 1099-NEC forms (deadline January 31).
4. File any state-specific year-end reports.
5. Archive the audit trail for the closed year.
6. Roll forward chart of accounts for the new year.
7. Update vendor W-9s and contract renewals for the new year.

Common year-end mistakes

• Starting in January. The W-9 collection and vendor-list confirmation belong to December at latest. January is for closeout, not discovery.
• Pre-aggregating data for the CPA.The CPA wants source detail; they'll aggregate. Pre-aggregated data hides errors and limits what the CPA can review.
• Skipping the year-end inventory count.The book inventory diverges from physical inventory over the year. The Dec 31 count is the anchor for next year's shrink calculations.
• Missing the lottery commission reconciliation.The state lottery files 1099-MISC against your EIN for the year's commissions. If your books don't match the 1099 figure, the IRS sees the mismatch.
• Forgetting amended quarterly returns.A small under-collection on Q3 sales tax discovered in November should be amended before December 31, not rolled into the annual.
• Not archiving the audit log. 7-year retention starts at year-end. If the audit log lives only in the live system, an account migration could delete it. Archive a year-end snapshot.