
Starting Your HDHP in December? How the HSA Last-Month Rule Lets You Contribute the Full Year
Covered by an HDHP on Dec. 1? The IRS last-month rule allows a full-year HSA contribution — but fail the 13-month testing period and owe tax plus 10%.
Plain-text accounting insights, tutorials, and updates from the Beancount.io team.

Covered by an HDHP on Dec. 1? The IRS last-month rule allows a full-year HSA contribution — but fail the 13-month testing period and owe tax plus 10%.

A written collections policy with a dated follow-up schedule gets invoices paid sooner — set terms, automate reminders, call at day 15, hold credit at day 45.

A fair kill fee is 25% before kickoff or completed work plus 25–50% of the rest mid-project — and every retained dollar is Schedule C income.

Off-highway gasoline earns $0.183/gal back and undyed diesel $0.243 — claim the federal credit on IRS Form 4136 with your return.

Two employers over-withheld? Claim excess Social Security tax on Schedule 3, Line 11; a single employer's error needs a W-2c and Form 843 instead.

An EEOC charge is an allegation, not a verdict: block retaliation, file a documented position statement in ~30 days, and weigh free mediation (70%+ settle).

Cost UL 325 safety devices as their own COGS line, target 50% gross and 15–20% net, and book gate maintenance contracts as deferred revenue.

There is no US accountant-client privilege: Section 7525 shields only civil IRS tax advice, while a Kovel arrangement via counsel also holds in criminal cases.

Home-to-work driving is never deductible, but a qualifying home office or temporary site flips the same miles to IRS business mileage at 76 cents each.

Colorado HB25-1090 lets restaurants keep service charges if every menu, website and phone quote states the amount and who gets it before the guest orders.

In Q1 2026, 31% of small business owners named cash flow their top worry, passing inflation. With a 27-day median buffer, track runway in days.

Canopy Bookkeeping watches your ledger all month and flags miscodes the day they appear — but AI errors are systematic, so pair it with weekly human review.