Running Daycare Out of Two Homes? How Time-Space Percentage Works

Most guidance on the home daycare tax deduction assumes exactly one home, one set of rooms, one square footage total. That assumption holds for the overwhelming majority of providers. It stops holding the moment your business touches a second property — a second licensed location you've opened, or simply a second home you own or rent that's now doing something for the business, even if the only thing happening there is storing overflow supplies or handling your paperwork away from the chaos of the actual daycare.

If that's your situation, the question that comes up fast is: do I calculate one time-space percentage for the whole operation, or something else? The honest answer is "something else," and this article walks through what that actually looks like. It assumes you already understand the basic mechanic — if you don't, start with our time-space percentage guide, which covers the single-home calculation in full; this article builds directly on top of it rather than re-explaining it. It also assumes you've already decided, or are actively deciding, whether a second location makes business sense at all — that's a separate question of economics and licensing capacity, covered in our second-location and co-provider economics guide. This article picks up only once a second property is genuinely part of the picture, and focuses purely on how the tax mechanic adjusts.

Before anything else: this is general information about how the deduction mechanic works, not tax advice for your specific properties. A two-property situation is exactly the kind of fact-specific scenario where the guidance in this article should be a starting point for a conversation with a CPA, not a substitute for one — more on why toward the end.

Why the deduction is tied to a specific home, not your household

The time-space percentage, as laid out in IRS Publication 587 and calculated on Form 8829, is built entirely around two numbers that only make sense for a single physical property:

• The space percentage — the square footage regularly used for daycare, divided by the total square footage of that home.
• The time percentage — the hours that specific space was used for daycare, divided by the total hours available in the year.

Multiply the two and you get the time-space percentage for that home, which is then applied to that home's own share of mortgage interest or rent, utilities, insurance, and other costs of running that specific property.

Notice what's baked into both halves of that formula: a total square footage figure, and a set of hours of use for a particular space. Those numbers don't exist at the level of "your business" in the abstract — they exist at the level of one house, with one roofline and one electric bill. A second property has its own total square footage, and its business use may run on a completely different schedule than the first. There's no version of the calculation that blends two different homes into a single combined percentage, because the inputs themselves aren't combinable — a bedroom in Property A and a basement in Property B don't share a denominator.

What this means in practice: two separate calculations

If your business genuinely touches two properties, the practical consequence is straightforward even though it doubles the paperwork: you work out a time-space percentage for each property, separately, using that property's own square footage and that property's own hours of business use — and apply it to that property's own expenses.

A few concrete scenarios where this comes up:

A second licensed daycare location, where you (or a co-provider) are actually caring for children in a second home. This is the clearer case: each location is its own place of business, with its own hours of operation, own square footage, and plausibly its own Form 8829 calculation feeding into the business's overall return. The economics of whether opening a second location like this makes sense at all — staffing, licensing capacity, the math of running two sites — is a different question than the tax mechanic, and it's the one our second-location economics guide is built to answer; this article only covers what happens on your return once that decision is made.

A second home used for storage, overflow, or admin work, where no child ever sets foot — say, a garage or a spare room at a property you own that holds excess supplies, or a room where you do bookkeeping and parent communication away from the daycare itself. Here the mechanic gets genuinely harder, and it's worth naming the open question honestly rather than papering over it: the special daycare exception to the ordinary "exclusive use" test exists specifically for space where you're providing care on a regular, non-exclusive basis. Whether a storage-only or admin-only room at a second property qualifies for that same relaxed daycare standard, or instead has to clear the stricter regular-and-exclusive-use test that applies to home offices generally, is not something Publication 587 spells out for a two-property fact pattern. That distinction can change your numbers meaningfully, and it's exactly the kind of judgment call this article won't make for you — a CPA needs to look at what's actually happening in that second space before you claim it either way.

In both versions, one thing is already clear from the mechanic itself: whatever you calculate for Property A, it gives you no shortcut for Property B. Each property earns its own hours log, its own square-footage figure, and its own percentage.

Depreciation follows the same split

If you're also depreciating the business-use portion of your home — covered in full in our home office depreciation guide — the same per-property logic applies there too, and arguably matters even more. Depreciation runs off a basis figure tied to one specific property: its purchase price or fair market value on the date business use began at that property, multiplied by that property's business-use percentage. A second home has its own basis, its own placed-in-business date, and its own depreciation schedule running in parallel to the first. Nothing about the first property's depreciation carries over or combines with the second — they're two separate, simultaneous calculations that happen to belong to the same business owner.

Keeping the records straight, property by property

The single biggest practical risk in a two-property situation isn't the math itself — it's letting the records blur together until April, at which point untangling "which hours happened where" and "which square footage belongs to which address" from memory is close to impossible. A few habits make this manageable:

• Log hours of business use by property, not as one combined weekly total. If you're at Property A Monday through Thursday and Property B on Fridays, that split needs to survive in your records exactly as it happened.
• Keep square footage figures for each property on file separately, along with a simple floor plan or note of which rooms count toward each one's space percentage and why.
• Track expenses (mortgage/rent, utilities, insurance, repairs) by property as they're paid, rather than as one household total you try to split apart later.
• If depreciation applies to both, keep each property's basis, placed-in-service date, and running depreciation total in its own file, since you'll need both records independently for years.

Why this is a CPA conversation, not a DIY one

A single-home time-space percentage is already a calculation most providers are better off double-checking with a tax preparer at least once. A two-property version compounds that: two sets of inputs, a real open question about which test applies to a storage-only or admin-only second space, and two depreciation schedules running at once if you own both properties. The dollar stakes of misclassifying either property — overclaiming a space that doesn't qualify, or underclaiming one that does — are higher here than in the single-home case simply because there's more surface area for a mistake. If you're not already working with a tax professional, a two-property situation is a reasonable point to start; our guide to when to hire a bookkeeper or accountant walks through the signs that it's time and what a bookkeeper versus a CPA actually each do for you.

Where DaycareFlow fits

DaycareFlow doesn't calculate time-space percentages, split expenses between properties, or file anything with the IRS — that work belongs with your CPA, for one property or two. What it can do is keep the underlying records clean enough that the calculation is possible in the first place: each child's billing and attendance history lives in their own profile, and the calendar's planned-attendance record gives you a dated log of when care actually happened — useful raw material for the hours side of a time-space calculation, whichever property it was logged at. It won't tell you which property a given hour counts toward or run the IRS math for you; that part stays with your tax preparer.

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Frequently asked questions

Can I combine two properties into one time-space percentage?

No. The time-space percentage is built from one property's total square footage and one property's hours of use, so the inputs for two different homes can't be blended into a single combined figure. If your business touches two properties, you calculate a separate time-space percentage for each one and apply it to that property's own expenses.

Does IRS Publication 587 explain how to handle a daycare business with two locations?

Not specifically. Publication 587 lays out the time-space percentage mechanic assuming a single home, and it doesn't walk through a two-property fact pattern in detail. That gap is exactly why a two-property situation is worth bringing to a CPA rather than extending the single-home formula yourself and hoping it holds up.

I only use my second home for storage, not for watching kids there — does the daycare exception still apply?

That depends on facts Publication 587 doesn't spell out clearly for this situation, which is why it's worth confirming with a tax professional rather than assuming. The daycare exception to the exclusive-use test is built around space where you're actively providing care; whether a storage-only or admin-only room at a second property qualifies for that same relaxed standard, or needs to meet the stricter exclusive-use test that applies to ordinary home offices, is a real open question a CPA should answer based on exactly how that space is used.

Do I need to depreciate both properties separately?

Yes, if the business uses both and you own both. Each property has its own purchase price or fair market value, its own date business use began, and its own business-use percentage, so each one runs its own independent depreciation schedule under Form 8829 rules — see our home office depreciation guide for how that calculation works for a single property before applying it twice.

Is opening a second daycare location worth it from a tax perspective?

Taxes aren't really the deciding factor here — the time-space percentage simply runs twice, once per property, rather than making a second location more or less advantageous on its own. Whether a second location is worth it comes down to economics: staffing costs, licensing capacity, and whether the added revenue clears the added expense. That full analysis is in our second-location and co-provider economics guide.