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How Long Should You Keep Email? A Plain Guide to Retention

How long should you keep emails? A plain guide to retention clocks for tax, work, and case mail, plus a simple written policy and a safe archive step.

People often ask for one simple number. Keep email for three years, or seven, or forever. The honest answer is that no single number fits all mail. The right clock depends on what the mail is.

Retention means how long you keep a record. Email retention means how long you keep email. A tax note follows one clock, for tax reasons. A staff record follows another, and a routine note needs a short clock.

This guide sets out the main clocks in plain words. It uses published periods from the IRS for tax records. IRS is the US tax agency, the Internal Revenue Service. It also uses the US National Archives model for roles.

This guide is general facts, not legal advice. Rules vary by job, place, and record type. A business should confirm its own duties with a professional. Use the clocks here as a starting point for that talk.

Why there is no single rule for email

Email is not one kind of record. One inbox holds many kinds of record at once. It holds tax mail, pay mail, and sales mail. It also holds lunch plans and quick hellos.

Each kind carries a different risk if lost. Losing a lunch plan costs very little. Losing a signed deal can cost a great deal. Losing tax proof can lead to fines or lost claims.

So the first step is to sort by kind. Ask what the mail proves or supports. Ask who may ask for it later, and when. The answers point to the right clock.

The IRS clocks for tax-related mail

The IRS publishes its recordkeeping rules as Topic 305. Recordkeeping means keeping the records that support your tax return. A tax return is the yearly form you file on income. Email counts when it holds that support.

Many tax records live first as email today. An invoice may arrive only as an attachment. A pay note may sit only in a thread. If that mail is your only copy, its clock is the record clock.

The general clock: three years

The general IRS period is three years. That is the basic clock for most tax records. It runs from the time you file the return. Keep the mail that supports that return that long.

This covers much day-to-day tax mail. Sales records, expense proof, and bank notes may fit here. So may mail about credits or deductions you claimed. A deduction is an amount that lowers your taxed income.

Six years when income was badly understated

The IRS period grows to six years in one case. That case is when income was badly understated. Understated means you reported much less than you earned. The published rule ties this clock to that gap.

You may not know at once if this case fits. A bookkeeper or tax pro can check the return. This is one reason tax mail needs care. Deleting at three years can be too soon for some files.

Seven years for two kinds of refund claims

The IRS period is seven years for two claim types. One is a claim for a loss from bad debts. A bad debt is money owed to you that will not be paid. The other is a claim for worthless securities.

Securities are things like stocks and bonds. Worthless means they have lost all their value. A refund claim asks the IRS to return tax paid. Mail behind such claims needs the seven-year clock.

Employment tax records: at least four years

Employment tax is tax tied to paying staff. The IRS says to keep those records at least four years. That period runs after the tax becomes due or is paid. The later of those two dates is the start point.

Payroll is the system that pays staff wages. Payroll mail can include pay rates and tax forms. It can include start dates, end dates, and hours. Treat that mail as a staff tax record.

No limit when there is no return, or a false one

Some cases have no time limit at all. One case is when no return was filed. The other is when a fraudulent return was filed. Fraudulent means the return was made to deceive.

A table of starting clocks

The table below pulls the tax clocks together. It is a starting point, not legal advice. Your own duties may be longer or different. Check them with a professional before you set policy.

Use the table to sort mail, not to end debate. Some mail fits in more than one row. A pay record may be both tax and staff mail. In that case, use the longer clock.

The NARA model: some mail is temporary, some is permanent

The National Archives has a second useful idea. Its short name is NARA. NARA is the agency that keeps US government records. It schedules federal email as temporary or permanent.

Temporary means the record is kept for a set period. Permanent means the record is kept for good. NARA ties that choice to the role of the person. The work of senior officials is treated as permanent.

This approach is called the Capstone approach. Capstone email is the mail of senior officials. Under GRS 6.1, that mail is permanent. GRS 6.1 is the name of that federal schedule.

For other staff, agencies set periods in policy. NARA notes that agencies set retention for temporary email. So each agency picks a period and writes it down. The key point is that the choice is written, not random.

How a small business can borrow this model

Owners and top managers make key choices. Their mail may hold deals, permits, and major plans. Keep that key mail for the long term. Treat it as your own near-permanent set.

Most daily mail is far more routine. Order confirmations and routine updates age fast. They can sit on a shorter, clear clock. The policy should name that clock in plain words.

Middle roles may need a middle clock. A finance lead holds tax and pay mail. A project lead holds client and contract mail. Give each role a clock that fits its records.

Contracts, staff records, and case files

Tax and role clocks do not cover all mail. Three other kinds come up for most teams. They are contracts, staff records, and case files. Each needs its own line in your policy.

A contract is a deal set down in writing. Contract mail may hold offers, changes, and sign-off. Keep it at least while the deal is live. Many teams keep it for years after it ends.

Staff records go beyond employment tax mail. They include hiring, reviews, and leaving notes. Some of that mail is sensitive and private. Access to it should be limited and logged.

Case files arise when you handle client matters. A case file may hold advice, evidence, and filings. Evidence is material that supports a fact or claim. Such files often need long, careful keeping.

The one rule that beats every clock: the hold

A litigation hold can override any schedule. Litigation means a legal dispute or court case. A hold means you must stop deleting related records. It applies when a dispute is live or likely.

This rule beats the neat clocks in the table. Mail due for deletion must be kept under a hold. That includes copies in inboxes and archives. It also includes mail held by individual staff.

Do not guess whether a hold applies to you. If a dispute is live or seems likely, ask a professional fast. Then pause deletion for the mail in scope. Write down the date the hold began.

A hold should also have a clear scope. Scope means the people, topics, and dates it covers. Staff need to know which mail to keep. Keep the hold in place until you are told it ends.

Write a simple policy your team can follow

A policy is a short written plan for a task. Your email policy can fit on one page. It needs four clear parts to work. Those parts are who, what, how long, and where.

Who means the roles the policy covers. Name owners, managers, and general staff groups. What means the kinds of mail each role creates. List tax, contract, staff, case, and routine mail.

How long means the clock for each kind. Use the IRS clocks for tax mail. Use your confirmed clocks for other kinds. Where means the place the kept mail is stored.

Add a few short lines to finish the policy. These lines cover the parts people forget most.

• Name one person who owns the policy.
• Set a date to review the policy each year.
• Say how holds are announced and lifted.
• Say where the archive volumes are stored.
• Say who can read each kind of archive.
• Say how deletion happens when a clock ends.

Keep the policy where staff can find it. Share it when a new person joins the team. Update it when roles or duties change. A policy no one reads does not protect anyone.

Turn kept mail into an archive before it vanishes

A clock only helps if the mail survives that long. Mailboxes close when staff leave or accounts change. Mail apps change formats and drop old tools. So move kept mail into an archive in good time.

An archive is a stored set made to last. The best time to archive is before a change. Do it before you close an account or mailbox. Do it before a key person leaves the team.

That is the moment to export a mailbox to PDF, while you still have full access. PDF is a common file format for reading and sharing. A merged PDF volume can hold a whole mailbox set. It reads in order and needs no mailbox to open.

MBoxToPDF turns mbox, eml, and msg files into one volume. The volume has a cover page and a contents table. The table lists each email and its start page. Emails run in date order, oldest first.

You can also group the mail by thread. Each email starts with a header block. The block shows From, To, Cc, Date, and Subject. It also shows Message-ID, the unique code for that email.

Attachments are kept with their emails in the volume. PDF, image, and plain text files become pages. Every attachment is also embedded as its original file. Office files are listed, embedded, and kept in a ZIP.

Starter and Pro add a CSV index for the set. A CSV is a simple table file of rows and columns. It lists one row per email, with attachment names. It also flags encrypted or corrupt messages instead of dropping them.

Pro adds filters by date and by keyword. It also adds Bates numbering for formal sets. A Bates code is a prefix plus a running number. The CSV records each email and its Bates range.

For long keeping, why PDF suits long retention comes down to simple reading. A PDF opens with many free tools, on many devices. It does not need the old mail app to work. That is why it suits mail kept for years.

If the mailbox came from Gmail, plan that export early. Our guide shows how to export Gmail before you delete it step by step. Do the export while the account is still open. Check the volume before you close anything.

Match the plan to the size of the archive

Archive size decides which plan fits the job. The Free plan allows 3 conversions per month, with files up to 25 MB. Each conversion can hold 100 emails, and MB means megabytes. The Free plan gives the merged PDF only.

Starter costs 15 dollars per month. It allows 30 conversions and files up to 200 MB. Each conversion can hold up to 2,000 emails. Starter adds the CSV index and the ZIP file.

Pro costs 29 dollars per month. It allows 100 conversions and files up to 1 GB. GB stands for gigabytes, a larger unit of size. Each Pro conversion can hold up to 10,000 emails.

Check plan limits for big archives before a large export. A staff exit may involve years of mail at once. Picking the right size keeps it in one clean volume. Only a successful conversion counts against your allowance.

Your files are handled with care during the work. They travel over HTTPS, the secure form of web traffic. They are processed on the server for the conversion. They are then deleted on their own after 24 hours.

Key points to take away

There is no single clock for all email. Tax mail follows the published IRS periods. Those periods run from three years to no limit. The facts of each case decide which one fits.

Role matters too, as the NARA model shows. Key mail from leaders deserves long-term keeping. Routine mail can follow a shorter, written clock. Holds beat all clocks when a dispute is in play.

So write the policy, name the clocks, and archive early. Confirm your own duties with a professional first. Then turn kept mail into volumes you can still read. That is how email retention stays simple and safe.

References

• Internal Revenue Service — Topic No. 305, Recordkeeping
• National Archives — GRS 6.1 FAQ: Temporary Email and Other Electronic Messages