House Flip Holding Costs: What to Track and How to Record Them in Your Bookkeeping

What are holding costs on a flip?

Holding costs are what a flip costs to own while it is being rehabbed and sold: loan interest, property tax, insurance, utilities and HOA dues. They build up every month the property is yours.

Rehab costs pay for work. Holding costs pay for time. A flip that sits a month longer costs a month more, whether or not anyone works on it.

Two costs of buying are kept apart from holding, the standard way. Closing costs paid when buying go under the purchase cost. Loan points and other loan fees, including the lender's title insurance and recording its deed of trust, go on their own loan costs line. Every one of them still counts in the deal's profit. The labels only make each cost easy to find and compare. That is how we track them, and your CPA decides how each is treated for tax.

Holding is one of the 4 stages in the house flipping bookkeeping guide, the time between the purchase and the sale.

Which costs count as holding costs?

Loan interest, property tax, insurance, utilities and HOA dues. Closing costs paid when buying go under the purchase cost, and loan points and fees go on their own loan costs line. Rehab and selling are separate groups. All of them count in the deal’s profit.

Here are the holding cost lines on Project 4, which Demo Flips LLC held for 216 days.

From the sample ledger of Demo Flips LLC.

HOA dues are a holding cost too, on a property that has an HOA. Project 4 had none. A loan extension fee, if a lender charges one, goes on the loan costs line with the points.

A flip usually sits empty, and an empty house has costs of its own. A vacant-property insurance policy goes on the insurance line. Upkeep while it sits, such as lawn care or winterizing, is a holding cost too: it is what the house costs to own while you wait, not work on the house. Both count in the deal's profit.

4 kinds of cost stay out of holding:

• Purchase and loan costs: Project 4 paid $2,292.00 of escrow, owner's title, deed recording and inspection when it was bought, under its purchase cost, and $8,114.00 of loan points, lender's title insurance and deed of trust recording, on its loan costs line.
• Rehab: invoices, materials and subcontractors. Project 4 spent $74,000.00 on rehab, in its own group.
• Selling costs: commission, sale escrow and title, transfer tax, staging. Project 4 paid $30,411.20 at the sale.
• Business overhead: Demo Flips LLC's own $2,880.00 liability policy, $149.00 a month of deal software and $85.00 a month for the phone. They serve every property, so they belong to none.

The builder risk policy on Project 4 is a holding cost. The company's own liability policy is overhead. Both are insurance, and they go to different places.

How do you track holding costs each month?

In 2 parts. First, what has been paid, coded to the property from the purchase closing statement and your bank and card statements. Second, an estimate of what is building up but not paid yet.

1. 1Give every flip its own holding cost accounts from the day it is bought.
2. 2Paid: from the purchase closing statement, record the closing costs under the purchase cost and the loan points and other lender charges under loan costs, both on that property.
3. 3Paid: record each interest charge, insurance premium, utility bill, HOA bill and tax installment from your bank and card statements on the property it is for.
4. 4Building up: estimate what is owed but not paid yet. Interest comes from the loan's rate and its balance each day. Property tax comes from the tax bill.
5. 5Add paid and building up for the holding cost to date, and compare it with what the sale is expected to leave before holding costs.

Part 1: what has been paid

Holding costs start the day the flip is bought. Each one comes from the bank and card statements, one line at a time, coded to the property. This is the monthly holding cost line for Project 4, as the books built it month by month.

Insurance $185.00, utilities $390.00 and property tax $341.00 make the $916.00 each month from December. Interest changes as the rehab draws raise the loan.

Part 2: what is building up but not paid yet

Paid costs run behind. Interest builds up every day and the lender bills it later. A tax bill builds up between installments. So at each month end we also estimate what is building up, from the documents that set it: the loan's rate and balance, and the tax bill.

Here is Project 4 at the May 31, 2026 close. Escrow was set to close on Jun 24, 2026. The loan charges 12% a year on each day's balance. The balance was $371,821.55 until a draw on Jun 4 took it to $390,200.00.

The sale was set to leave $25,182.80 before holding costs. On May 31 the paid holding costs alone were $27,675.60, already past it. With what was building up, the deal was headed for -$6,469.51 before it closed.

The estimate holds up because it uses the loan's own terms. On Jun 24 the payoff letter charged $3,060.71 of June interest, the same figure. Here the county bill is paid in monthly installments, so the tax was paid on Jun 20. Where a tax bill is paid twice a year, the same amount builds up each month and stays in the estimate until it is paid or settled on the sale statement.

The interest, and the points on their own loan costs line, come from the lender's statement. We record each one as shown in hard money loan bookkeeping.

How much did holding cost on the sample flips?

$143,625 across 7 sold flips. Loan interest was the largest line by far, at $115,537. Loan costs, kept on their own line (points plus the lender’s title insurance and deed of trust recording), added another $54,110.

Here are the holding cost lines for every flip Demo Flips LLC sold in the sample year.

Summed from the sample ledger. On their own lines, the same 7 flips paid $54,110.00 of loan costs and$15,222.00 of closing costs when they were bought.

Interest alone was $115,537. Insurance, utilities and property tax together were $28,089. The loan is what made time expensive on these flips.

When do holding costs decide a deal?

When they pass what the sale leaves after purchase, loan, rehab and selling costs. Project 4 had $25,182.80 left before holding costs. Its holding costs reached $31,652.31, so it lost $6,469.51.

At the May 2026 close, Project 4's holding costs were already $27,675.60. That was more than the $25,182.80 the sale would leave before them, a month before the house sold. The monthly line showed it while there was still a month to go.

Our guide to house flip profit checks the result line by line against the estimate.

Where do holding costs go in the books?

On the property they belong to, in holding cost accounts, until the property sells. Then they come off with its purchase and rehab, inside that deal's result. How they are treated on your return is your CPA's call.

• Purchase cost: the price and the closing costs paid when buying, per property.
• Loan costs: points and other loan fees, including the lender's title insurance and deed of trust recording, per property.
• Holding costs: interest, property tax, insurance, utilities and HOA dues, per property.
• On the sale day, the property's costs move to cost of flips sold, next to the sale price.

The real estate chart of accounts lists those accounts with what posts to each.

Whether a holding cost is added to the property's cost or deducted as paid is a tax decision for your CPA. The books keep every one dated and coded to its property, so either treatment can be supported. The IRS sets out which settlement costs go into a property's basis in IRS Publication 551, Basis of Assets.

How do you estimate holding costs before you buy?

Multiply a monthly holding cost by the months you expect to hold, and add the closing and loan costs you will pay at purchase on their own lines. Then test a longer hold, because the hold is the number that moves most.

Project 4 paid $10,406.00 of closing and loan costs on the day it was bought, on their own lines. Its holding costs then built up: from December to May each month added between $4,104.17 and $4,705.52. At 131 days, on Mar 31, 2026, they stood at $18,443.41. The full 216 days cost $31,652.31.

To try a deal before you buy it, use the house flipping calculator with a monthly holding cost, the months you expect to hold, and the closing and loan costs you will pay at purchase.

To track the real thing, the free deal profit tracker (Excel spreadsheet) has a holding costs tab that adds up each month and shows when holding costs pass what the sale will leave.