Mid-Month Convention — What It Means for Your Depreciation

TL;DR: The mid-month convention is a MACRS timing rule that treats residential and nonresidential real property as placed in service on the middle of the month, no matter which day you actually closed. You get a half-month of depreciation in the month of purchase and a half-month in the month of sale. The month matters; the exact day doesn't.

_Last reviewed: July 2026 · 6 min read_

You close on a rental house on January 3rd — but for depreciation purposes, the IRS treats it as if you closed on January 15th. That timing shift is the mid-month convention, and it affects how much depreciation you claim in your first and last year of ownership.

Okoniq Property Hub logs the placed-in-service date alongside your acquisition cost, making it simple to reference when you file or when your CPA asks for documentation years later.

What does "mid-month convention" mean?

The mid-month convention is a MACRS timing rule stating that real property — residential rental buildings, commercial structures, land improvements eligible for depreciation — is treated as placed in service (or disposed of) at the midpoint of the month, regardless of the actual calendar day.

If you close on a rental property on the 2nd or the 29th of June, MACRS treats it as placed in service on June 15th. You get one-half month of depreciation for June in your first tax year. The rule exists because real estate transactions happen on scattered dates, and applying a single convention simplifies table lookups and recordkeeping.

The mid-month convention applies automatically to property depreciated under MACRS using the straight-line method — which includes nearly all residential rental real property. You don't elect it; you follow it. Personal property (appliances, furniture) uses a different convention (usually half-year or mid-quarter), so the mid-month rule is specific to the building structure and certain land improvements.

When you pull the MACRS depreciation table for your property, the first-year percentages are already divided by 12 months, and the table assumes mid-month placement. The column you use depends on which month you placed the property in service — not which day.

Does it apply to residential rental property?

Yes. Residential rental property — defined by the IRS as a building where 80% or more of the gross rental income comes from dwelling units — is real property depreciated under MACRS. The mid-month convention applies by default.

That means your single-family rental, duplex, or apartment building all follow the same timing rule. The building structure itself is the depreciable asset; the land underneath is not. Components like carpets, appliances, and removable equipment are personal property and follow a different convention, which is why cost segregation studies separate those items out.

The placed-in-service date is the day the property is ready and available for rental, not necessarily the day a tenant moves in. If you close on July 10th and the property is habitable that day, it's placed in service in July — treated as July 15th under the mid-month convention. If you close in July but spend three months on renovations before it's rentable, the placed-in-service date moves to the month the work finishes.

Your depreciation schedule spans many years, and the cost basis calculation you start with includes the purchase price, closing costs allocable to the building, and capital improvements made before the property was ready. The mid-month convention just determines how much of the first year's depreciation you actually claim.

How does it affect the first year of ownership?

The mid-month convention compresses your first year of depreciation into a partial-year amount based on how many months the property was in service. A property placed in service in January gets 11.5 months of depreciation in year one (half of January plus all of February through December). A property placed in service in December gets 0.5 months (half of December only).

The MACRS tables published by the IRS reflect this automatically. Each table has a column for the month of placement — you read across that column to find the first-year percentage, and it's already adjusted for the mid-month rule. The table does the math; you just apply the percentage to your depreciable basis.

For example, say you have a residential rental property with a depreciable basis of $200,000. The property is placed in service in June. Looking at the appropriate MACRS table, the first-year percentage for property placed in service in June is a specific value that accounts for June through December with June treated as a half-month. You multiply that percentage by $200,000 to get your first-year depreciation deduction.

The exact percentage depends on the recovery period set by statute for residential rental property — the generator was instructed not to state figures not verified against IRS.gov as of the date above, and recovery periods were not re-verified for this post. Confirm the current recovery period and table on IRS Publication 527 or with your CPA, then apply the month-of-placement column to your basis.

Whether you closed on June 1st or June 30th makes no difference — both are treated as June 15th. The month is what drives the first-year deduction, not the day. Keep your closing statement and the date you made the property available for rent; the exact day matters for documentation, but the mid-month convention smooths it into a half-month for depreciation purposes.

Does the convention apply when you sell the property?

Yes. The mid-month convention also applies in the year of disposition. When you sell the rental property, you're allowed depreciation for the months you owned it in that final year, with the month of sale counted as a half-month.

If you sell in March, you get 2.5 months of depreciation in the year of sale (half of January, all of February, half of March). If you sell in November, you get 10.5 months. The same MACRS tables that gave you the first-year percentage also list the percentages for the final year based on the month of disposition.

This matters for depreciation recapture calculations. The total depreciation you've claimed over the life of the property — including the partial first year and partial last year — is the amount subject to recapture as ordinary income (up to the recapture limit) when you sell. An extra half-month here or there across a 10-year hold isn't enormous, but it's precise, and the IRS expects the math to match the conventions you followed.

If you do a 1031 exchange instead of an outright sale, the mid-month rule still applies for depreciation in the relinquished property's final year. The replacement property then starts its own depreciation schedule with a new placed-in-service date and its own mid-month convention applied to the carryover basis.

The sale date on your closing statement is your disposition date. The mid-month rule treats it as mid-month. Keep that closing statement; your CPA will ask for it when computing the final-year depreciation and the total depreciation subject to recapture or excluded by a 1031.

What records should you keep for the convention?

Keep the closing statement (HUD-1 or settlement statement) that shows the date you acquired the property. That date — or, more precisely, the month — determines which column of the MACRS table you use for the first-year depreciation percentage. The statement also breaks out your purchase price and closing costs, which feed into your depreciable basis.

If the property wasn't ready to rent on the closing date, document the placed-in-service date separately. Save invoices for any capital improvements you made before the first tenant moved in, and note the date the property was available. The placed-in-service date can differ from the closing date by weeks or months if you renovated first; the mid-month convention applies to the placed-in-service month, not the purchase month.

When you eventually sell, keep the disposition closing statement as well. That document shows the sale date (the month of which determines your final-year depreciation) and the sale price (which feeds into the gain calculation and recapture math). If you're carrying forward passive losses or claimed a Section 179 deduction on personal property within the building, those records tie back to the acquisition and disposition dates too.

A simple spreadsheet or note in your property file — "placed in service June 2022, mid-month convention, depreciable basis $185,000" — is enough to jog your memory years later. The mid-month rule itself is mechanical (you just read a table), but you need the month and the basis number to read the right cell. Okoniq Property Hub stores acquisition details alongside your property record, so the placed-in-service date and original basis are always a tap away when tax season arrives or when you're preparing Schedule E.

FAQ

Does the mid-month convention apply to land?

No. Land is not depreciable, so no convention applies to it at all. The mid-month convention affects the building and certain depreciable land improvements (parking lots, fences) but not the land parcel itself. Your purchase price must be allocated between land and building; only the building portion (and depreciable improvements) follows MACRS and the mid-month rule.

If I close on January 31st, do I get a full month or a half-month?

You get a half-month. The mid-month convention treats every date in January as January 15th, so January 31st and January 2nd both yield the same depreciation for January — one-half month. The actual closing day within the month doesn't change the depreciation amount.

Does the mid-month convention change the total depreciation over the property's life?

No. The total depreciation you claim is still your full depreciable basis, spread over the statutory recovery period. The mid-month convention only shifts the timing — you get less in year one and more spread across the middle years, then less again in the final partial year. The sum over the entire recovery period equals the basis, assuming you hold it that long.

Can I elect out of the mid-month convention?

No. MACRS real property follows the mid-month convention automatically. There's no election to use a different convention for buildings. Personal property (appliances, carpets) may use the half-year or mid-quarter convention depending on when it's placed in service, but the structure itself is locked into mid-month.

How does the mid-month convention interact with bonus depreciation?

Bonus depreciation (which was made permanent at 100% for property acquired after January 19, 2025, per Treasury guidance) applies to qualified property, which generally means personal property with a recovery period of 20 years or less. Residential rental buildings have a longer recovery period and do not qualify for bonus depreciation. The mid-month convention applies to the building; bonus depreciation (if applicable) would apply to shorter-life assets like appliances or removable equipment within the property, which follow a different convention.

<div class="glass rounded-2xl p-5 mt-7 max-w-4xl border border-red-400/30 bg-red-500/5"> <div class="flex items-start gap-3"> <span class="text-2xl flex-shrink-0">⚠️</span> <div class="flex-1 min-w-0"> <p class="text-red-200 text-sm font-bold">Not tax advice</p> <p class="text-slate-300 text-xs mt-1 leading-relaxed"> This post assumes residential rental property under MACRS and does not address nonresidential property, alternative depreciation systems, or state-level depreciation rules that may differ. It does not account for changes in federal tax law after January 2025 or your specific entity type, holding period, or passive activity limitations. Tax rules change and depend on your specific situation. Talk to a licensed CPA before acting on anything here, and confirm current figures on IRS.gov. </p> </div> </div> </div>