Data retention basics: how long to keep things
Keeping everything forever feels safe until you can't find anything and your storage bill keeps growing. Deleting aggressively feels tidy until you need a receipt from four years ago. Sensible retention sits in between: keep what you need, for as long as you need it, and let the rest go on a schedule.
Important: this is general guidance, not legal or tax advice. Regulated industries and specific situations (lawsuits, audits, disputes) have their own rules. When in doubt, ask a professional before deleting anything you might be required to keep.
Think in three tiers
Every piece of data you hold falls into one of three buckets:
- Active: you use it regularly. Keep it where you work — your documents folder, the shared drive's current folders, the apps you open daily.
- Archive: you rarely need it, but you might. Old tax returns, finished project files, expired contracts. Move these somewhere out of the way but retrievable — an archive folder, an external drive, cold cloud storage.
- Delete: duplicates, outdated drafts, files superseded by newer versions, temp downloads you forgot about. These are just noise.
Most retention anxiety comes from treating everything as active. Once you give yourself permission to archive and delete, the volume becomes manageable.
General rules of thumb by record type
These are common-sense starting points, not legal requirements — your country, industry, or situation may require longer:
- Tax records: keep for several years after filing. Tax authorities in most countries can audit back multiple years, so "a long time" is the safe default. Check your own tax authority's published guidance for the exact period.
- Financial records: bank and credit card statements, major purchase receipts, loan documents — keep for several years, and keep proof of ownership for big assets (homes, vehicles) for as long as you own them.
- Legal and contracts: keep for the life of the agreement plus a few years after it ends. Expired leases, old insurance policies, and closed accounts can usually be archived rather than kept active.
- Employment records: pay stubs, tax forms, and employment contracts are worth keeping for several years after you leave a job.
- Personal and household: warranties for as long as the item is under warranty; manuals are almost always available online — scan and toss the paper.
- Photos and personal records: these are usually keepers. Storage is cheap; memories are not. Back them up instead of agonizing over them.
When retention rules get stricter
Delete nothing — and pause any routine cleanup — if any of these apply:
- You are involved in, or reasonably expect, a lawsuit or legal dispute.
- You are under audit or investigation.
- You've been told by a lawyer or regulator to preserve records.
This is called a legal hold. Deleting records during one can have serious consequences. When the situation resolves, normal retention resumes.
Run a cleanup pass once a year
You don't need a complicated policy — you need a recurring habit. Once a year, work through your main storage areas:
- Downloads and desktop first: this is where the junk accumulates. File what's worth keeping, delete the rest.
- Move finished work to archive: projects, tax years, and documents that are done move out of your active folders.
- Delete with confidence: duplicates, superseded versions, installers you can re-download, screenshots you'll never need again.
- Update your backups: after a cleanup, confirm your backups ran and captured the current state.
Do it in one sitting if you can — a focused hour beats three months of "I'll get to it." Tie it to an existing annual event, like tax season, so you don't forget.
Write down your own rules
A one-page note — "tax records: archive 7 years; warranties: archive until expired; drafts: delete when superseded" — removes all future guesswork. You make the decision once, then just follow the list. For a business, even a small one, this one-pager is also what shows you acted sensibly if questions ever come up.