Two failure modes, roughly equally common.

The first is the garage full of boxes: every receipt from every year since the 1990s, unsorted, never consulted, taking up space and providing no comfort because nobody could find anything in it anyway.

The second is the shrug: nothing kept, on the assumption that the bank has it or it doesn’t matter.

The useful approach is in between, and it turns on a single question — does this record prove something I couldn’t otherwise reconstruct?

Two kinds of record

Records supporting a specific year’s return. Income documents, receipts for claimed deductions, records substantiating positions taken. These matter for as long as that return could realistically be examined, and then they largely stop mattering.

Records establishing basis or carryforward. What you paid for an asset. Improvements to a property. A capital loss being carried forward. Depreciation already claimed. These matter until the asset is sold or the carryforward is used up — which might be thirty years.

The second category is the one people get wrong, because the retention period isn’t tied to the year the record was created. A purchase document from decades ago can still be the thing that determines your tax when you finally sell.

How long

Retention periods are tied to how long a return remains open to examination, and those periods vary — by jurisdiction, by circumstance, and by what’s on the return. Certain situations extend them considerably, and some circumstances leave a year open indefinitely.

Rather than working from a remembered rule of thumb, it’s worth confirming the periods that apply to your situation. What’s more durable is the principle: keep year-specific records for as long as the year is open, and keep basis records until the asset is gone.

States frequently apply their own periods, and they aren’t always the same as the federal one. If you file in multiple states, the longest applicable period is the practical answer.

The keep-indefinitely list

Regardless of how long any particular year stays open, some things are worth keeping permanently because reconstructing them ranges from difficult to impossible:

  • Copies of filed returns. Not the supporting documents, the returns themselves. They’re compact and repeatedly useful.
  • Property purchase and sale documents. Closing statements for anything you’ve owned.
  • Records of improvements to property. These affect basis and are the most commonly lost records in this category.
  • Investment purchase records, especially for anything held long-term, inherited, or transferred between brokerages.
  • Valuations of inherited assets at the relevant date.
  • Retirement account records for contributions that were already taxed.
  • Business formation documents and elections.
  • Depreciation schedules for business or rental assets.
  • Records of a residency change, if you’ve moved between states.

Most of this fits in one folder. It’s not a storage problem — it’s a knowing-which-ones problem.

What you can let go

Once a year is genuinely closed and you’ve extracted anything basis-related:

  • Routine receipts for ordinary deductions on a closed year
  • Bank and card statements for closed years, unless they substantiate something specific
  • Utility bills, unless supporting a home office or rental claim
  • Duplicate copies of income documents already reflected on the filed return

Shred anything with account numbers or identifying details rather than binning it.

Digital is fine

Scanned or photographed records are generally acceptable, provided they’re legible and complete. This is a substantial improvement — a folder per year in cloud storage is easier to search and harder to lose than boxes.

Two things worth doing properly:

Actual backup. One copy on one laptop is not a records system. Cloud storage with version history, or a second location.

Consistent naming. “IMG_4471.jpg” is not a record. A year folder with descriptive filenames takes moments longer and makes the difference between having records and having files.

For anything with an original that matters legally — property deeds, formation documents — keep the paper too.

Small habits that pay off later

Note the purpose on business receipts at the time. Which client, what for. A receipt with no context is weak support years later when nobody remembers.

Log the mileage as you go. Contemporaneous records are substantially stronger than a reconstruction, and everyone who reconstructs one hates it.

File the closing statement immediately when you buy property. It’s the single most commonly misplaced basis document.

Keep improvement records in a property folder, not the year folder. You need them at sale, not at filing, and by then you’ll have forgotten which year the roof was done.

The five-minute version

Keep a permanent folder for basis and carryforward records — property, investments, formation documents, returns. Keep a folder per year for that year’s supporting documents. Let closed years go once you’ve checked nothing basis-related is in them.

That’s it. It doesn’t need a system, and it will make a real difference in a year when someone asks you to prove something.

This article is general information, not tax advice. Retention periods depend on your circumstances — get in touch if you’d like to talk through what applies to you.