Chapter 14: Year-End Moves and Recordkeeping — Beat the Clock

This post is Chapter 14 of 14 of the book Keep More of What You Earn — a plain-English guide to US taxes.

December 28th. Two freelancers, same income, same deductions — almost. Elena spends the week between Christmas and New Year’s with a checklist: she tops up her HSA, harvests a $4,000 investment loss, bunches next January’s charitable gift into December, and invoices a big client dated January 2nd instead of December 29th. Marcus spends the week on the couch. Same year, same earnings — come April, Elena owes $2,800 less than Marcus.

The only difference: she acted before December 31st — the date after which most tax planning options expire permanently. You can’t fund a 401(k) for 2026 in March 2027. You can’t harvest a 2026 loss in 2027. The clock is the whole game.

The principle: December 31st is a cliff; April 15th is an epilogue

Nearly every planning move expires at midnight on December 31st: charitable gifts, investment sales, retirement contributions through work, business equipment purchases, medical spending, Roth conversions. After that, only three moves survive: IRA contributions (until April 15, 2027), HSA contributions (same deadline), and amending your strategy for next year.

So the rhythm is: November = review and project. December = execute. January–April = contribute the stragglers and file.

The November review (one hour, once a year)

1. Project total income — wages to date plus expected, freelance collected, investment income realized.
2. Project AGI — subtract above-the-line items (401(k), HSA, half SE tax).
3. Find your marginal bracket and your distance to the next one. $3,000 of headroom in the 12% bracket? That’s $3,000 of Roth conversions or gain harvesting at 12%.
4. Check phaseout proximity: education credits, child care credit thresholds, IRA deductibility, QBI thresholds. Near a line? December moves can pull you under.
5. Estimate withholding vs. liability — if short, bump W-4 withholding now rather than sending an estimated payment late.

The December moves, by chapter

Retirement: Max out workplace contributions by Dec 31st — 401(k) payroll contributions can’t be made retroactively. Check year-to-date totals in November ($24,500 / $32,500 at 50+ / $35,750 at 60–63) and adjust December paychecks. Self-employed: establish the Solo 401(k) by Dec 31st.

Health accounts: Top up the HSA to $4,400/$8,750. Spend down the health FSA — only $680 carries over for 2026; the rest evaporates.

Charitable: Execute bunching — December gift vs. January gift, donor-advised fund contribution, appreciated-stock transfer (allow a week for brokerage processing). 70½+ with an IRA: QCDs directly to charity count toward RMDs without touching taxable income.

Investing: Harvest losses before Dec 31st (mind the 30-day wash-sale window). Harvest gains at 0% in a low-bracket year. Check mutual fund distribution dates before buying. Review asset locations.

Income timing: Cash-basis freelancers: a December invoice dated January defers income a full year. Expecting a bonus? January payment vs. December payment shifts the tax year.

Medical: Big medical year? Accelerate every elective procedure, refill, and appointment into December to clear the 7.5%-of-AGI floor once.

RMDs: Take required minimum distributions by December 31st — the 25% penalty for missing one is the year’s harshest.

2026-specific checks: the $6,000 senior bonus deduction (65+, phases out above $75k/$150k MAGI); $25,000 tip deduction and $12,500 overtime deduction — the records must exist; $10,000 auto loan interest deduction on qualifying vehicles; $1,000 Trump Account seed for 2025–2028 births (Form 4547).

Business owners: Equipment purchases before Dec 31st may qualify for immediate expensing — verify the current year’s treatment first. Prepay January expenses in December if cash-basis. Issue 1099s to contractors in January (deadline Jan 31st).

The January–April epilogue

1. Fund the IRA ($7,500/$8,600) and top up the HSA by April 15, 2027.
2. Gather documents — folder open January 1st, file late February at the earliest.
3. Q4 estimated payment by January 15, 2027 (counts for 2026).
4. Do the November review for the new year — calendar reminders for estimates, W-4 adjustments for life changes.

Recordkeeping: the system that makes it audit-proof

How long: 3 years from filing (standard audit window, minimum for everything); 6 years for income records; 7 years for bad debts; ownership + years for property records; forever (digitally) for returns and Form 8606s.

How: scan everything into a dated folder structure, back up to cloud + local, log mileage and expenses contemporaneously. Reconstructed-from-memory in April is not adequate.

The annual calendar: January — open the new folder, issue 1099s, Q4 estimate due Jan 15. February–March — collect forms, don’t file before the mail stops. April 15 — file + pay + fund IRA/HSA + Q1 estimate. June 15 / Sept 15 — estimates. November — the review. December — execute.

Elena’s December week took six hours and saved $2,800 — a $460/hour return on her time. And zoom out: $2,800 saved yearly for 30 years at 7% compounds to roughly $264,000. That’s not a tax strategy — that’s a retirement.

The December triage: if you only have two hours

In order of dollar impact:

1. Workplace retirement top-up (30 min) — check YTD against limits, increase December deferrals.
2. HSA top-up + FSA spend-down (30 min).
3. Tax-loss harvest scan (30 min).
4. Charitable bunching decision (20 min).
5. RMD check (10 min) — avoiding a 25% penalty is potentially thousands.

Two hours, five moves, most of the chapter’s value.

What NOT to do in December

• Don’t trigger the wash sale — selling Dec 20th and rebuying Jan 5th kills the loss deduction.
• Don’t buy a mutual fund before its distribution — check dates first.
• Don’t donate without the receipt rules — $250+ needs the charity’s written acknowledgment.
• Don’t prepay state taxes beyond the SALT cap (~$40,400) — dollars above buy nothing.
• Don’t make moves for tax reasons that lose money overall. Never spend a dollar to save thirty cents.

The 2026 watchlist: verify before you file

• Trump Accounts: contribution rules and qualified uses — check IRS guidance.
• Tip and overtime deductions: qualifying occupations, W-2 reporting, phaseout mechanics.
• SALT cap final figure (~$40,400 mechanical increase — confirm).
• Bonus depreciation percentage for 2026 equipment.
• ACTC refundable amount for 2026 (2025 was $1,700).

Key takeaways

1. December 31st is the cliff. Almost every planning move expires at year-end; only IRA/HSA contributions survive until April 15th.
2. The November review is one hour: project income, find bracket headroom, check phaseouts, verify withholding.
3. December’s greatest hits: max workplace retirement, top up HSA, spend down FSA ($680 carryover), bunch charity, harvest losses and 0% gains, take RMDs, time invoices and state payments.
4. 2026’s new provisions need December attention: senior bonus ($6,000), tip ($25,000) and overtime ($12,500) deductions, auto loan interest ($10,000).
5. Keep everything 3 years minimum — scanned, backed up, contemporaneous.
6. Triage when overwhelmed: retirement top-up, HSA/FSA, loss harvest, charity timing, RMD check — two hours captures most of the value.
7. Never spend a dollar to save thirty cents.

Next: the Conclusion — tying every thread together.