Bookkeeping systems that survive an audit and a decade

Rental property generates transactions continuously and reporting requirements annually. Reconciling one against the other in April, from a folder of receipts, is where errors and missed deductions live.

Separate accounts, without exception

A dedicated bank account for rental activity, never mixed with personal funds.

Three reasons.

Bookkeeping becomes mechanical, since every transaction in the account is business-related.

Documentation for an examination is straightforward.

And if property is held in an entity, commingling is one of the primary grounds on which courts disregard the entity, eliminating the liability protection that was the point of forming it.

A dedicated card for property expenses is equally worthwhile.

For multiple properties, either separate accounts per property or one account with rigorous per-property categorization. The first is cleaner; the second is manageable with good software.

Software

Any of the common options work, and the choice matters less than using one consistently.

General accounting software handles it well with a properly structured chart of accounts.

Property-specific platforms add rent collection, tenant portals, maintenance tracking and lease management, which is useful at scale and unnecessary for one property.

Spreadsheets work for a small portfolio if maintained rigorously, and they do not scale and do not reconcile automatically.

Whatever the choice, connect the bank feed so transactions import automatically, and categorize weekly rather than annually.

The chart of accounts

Structure it to match the tax reporting categories from the outset, so the annual return is a report rather than a reconstruction.

Income: rent, other income by type — parking, storage, laundry, pet fees, late fees, utility reimbursement.

Expenses: advertising, auto and travel, cleaning and maintenance, commissions, insurance, legal and professional, management fees, mortgage interest, other interest, repairs, supplies, taxes, utilities.

Separately: capital improvements, which are not expenses and must not be mixed in. A separate category, by property and by item, feeding the depreciation schedule.

And separately: security deposits, which are a liability rather than income and should never be recorded as revenue.

The repair versus improvement discipline

Categorize at the time, not at year end.

Note on each invoice what the work actually was, specifically. "Replaced twelve damaged shingles and repaired flashing at chimney" supports a repair classification. "Roof work $8,400" does not.

Photograph before and after.

Adopt a written capitalization policy before the tax year begins, so the de minimis safe harbor is available. This is a short document and its absence forfeits a useful election.

Per-property tracking

Essential, and frequently neglected by owners of several properties.

Each property has its own basis, its own depreciation schedule, its own passive loss history, and its own performance.

Aggregated bookkeeping makes it impossible to know which property is actually performing, and it complicates any eventual sale or exchange.

Allocate shared costs — travel, professional fees, general supplies — on a reasonable and documented basis.

The documents to retain

Receipts and invoices for everything. Photograph them on receipt; paper fades and gets lost.

Bank and card statements.

Closing statements from purchase, permanently.

Capital improvement documentation, permanently.

Depreciation schedules, permanently.

Leases and tenant records.

Mileage logs, contemporaneous, if claiming vehicle expenses. Reconstructed logs are routinely disallowed.

Retention periods for tax records are generally several years and longer in certain circumstances. Anything affecting basis should be kept for the life of the ownership plus the period after sale.

The monthly routine

An hour a month, which replaces a very unpleasant week in April.

Reconcile the bank account. Categorize all transactions. File or photograph any receipts. Record rent received and any arrears. Note maintenance performed and classify it. Transfer the reserve amount.

Then a quick look at the numbers: is anything unusual, is any expense trending up, is anyone late?

Working with an accountant

Use one who works with rental property specifically. The rules around depreciation, capitalization, passive losses and dispositions are technical, and a generalist preparer will frequently take conservative positions that cost money.

Give them clean books. An accountant reconstructing your records charges for it, and the result is worse.

Ask questions during the year rather than in April, when a decision can still be influenced.

And ask specifically about: capitalization policy, cost segregation viability, passive loss position, and anything unusual you did during the year.

Backups and succession

Cloud storage, with a second backup.

And a document telling someone else where everything is, which becomes important at exactly the moment you cannot explain it.

General information about record-keeping, not tax, accounting or legal advice. Retention requirements and tax rules vary and change. Consult a qualified tax professional about your own circumstances.