There is no default length. The North Carolina Offer to Purchase and Contract leaves the Due Diligence Period date blank, and the Real Estate Commission is explicit that the date is a matter of negotiation, so the number you agree to is a decision you are making about your own risk. We counsel sellers to work backward from what the buyer’s lender actually needs rather than picking a round number, and to charge a due diligence fee large enough to make the shorter end worth the buyer’s while.
Sellers tend to think of the due diligence period as a window they are handing over. It is more useful to think of it as the price of a contract. During that window the house is off the market, the buyer can terminate for any reason at all, and the only money you are certain to keep is the due diligence fee. The question is not how short you can make it. The question is how short you can make it without losing the buyer or inviting an extension request two days before it expires.
Here is how we size it on our own listings, and what the 2026 form changes did to the calculation.
The contract does not set a length. You and the buyer do.
When North Carolina moved to the due diligence structure, the Real Estate Commission spelled out what it means for both sides. The end date “is a matter of negotiation,” buyers and sellers naturally want it at different points in the transaction, and before the period expires the buyer “may terminate the contract for any reason or no reason by written notice to the seller.” If the buyer does terminate, the Commission notes that time is “of the essence” regarding that notice, which is the one rule that cuts in your favor: a termination notice delivered late is not effective.
The due diligence fee is a separate negotiation. The Commission describes it as “a negotiated amount, if any, paid by Buyer to Seller” for the right to conduct due diligence, says payment is optional, and says plainly that it is the seller’s compensation for taking the property off the market. Two words in there matter to you. “If any” means a buyer can offer nothing. “Compensation” means the fee is the thing you are trading the period for, so a long period with a meaningful fee is often a better deal than a short period with no fee at all.
The Commission also tells buyers to consult their lender before signing so the period allows enough time for the appraisal and the loan decision. Read that as a warning to sellers too. A period that is too short for the lender does not protect you. It just moves the conversation to an extension request.
Work backward from the lender, not from a round number
Inside the period a financed buyer is ordering a home inspection, usually a separate pest or crawlspace inspection on an older coastal house, a survey if the lot lines or the flood determination are unclear, a homeowners and flood insurance quote on the specific address, and an appraisal that the lender will not order until the inspection results are in hand. The appraisal is the long pole, and it is the one neither party controls.
That sequencing is why a ten-day period on a financed offer almost always comes back for more time. The inspection happens on day four, the repair conversation runs through day seven, the appraisal gets ordered on day eight, and the appraisal report does not exist yet. You can refuse the extension. You will usually be refusing it to a buyer who has already spent money, which is a buyer worth keeping.
Rates sharpen this. The 30-year fixed stood at 7.40 percent for the week ending October 15, 2026, up 74 basis points in eight weeks, per the Freddie Mac survey tracked on our monthly mortgage update. In a market moving that direction a buyer’s rate lock has a shelf life, and a due diligence period that runs long can push a buyer past it. That argues for a period that is realistic the first time rather than one that gets extended twice.
What the 2026 form changes do to your due diligence date
NC REALTORS released revised residential forms on May 27, 2026, and the changes land squarely on the fee rather than the period. The due diligence fee is still due on the Effective Date. What changed is the consequence of a late payment: the buyer is no longer in breach the next day, and instead has until the end of the next banking day to pay. Paragraph 22 now defines “banking day” so the deadline can be calculated.
A late fee also no longer lets you terminate on your own. Under the revised form you must first give written notice demanding payment within one banking day, using Form 355-T, and only then may you terminate, and you are not required to. Paragraph 8(c) adds the practical remedy sellers asked for, which is the ability to restrict physical access to the property in that situation without affecting the rest of the buyer’s due diligence. That provision exists because of buyers who paid late, inspected immediately, and terminated before the seller could demand payment.
Paragraph 6(e) now requires the buyer to provide information for FinCEN and other governmental reporting, which matters mostly on cash purchases through entities. If you listed before late May and your agent is working from an older form, ask which version is in front of you.
- New Hanover County: 61 days on market against 34 a year ago, 1,251 active listings, and two of every five active listings have already taken a price cut Our New Hanover County market update, three months ending September 2026
- Brunswick County: 93 days on market against 64 a year ago, with about 38 percent of active listings showing a price cut Our Brunswick County market update, three months ending September 2026
- Pender County: 83 days on market against 51 a year ago, with 430 active listings Our Pender County market update, three months ending September 2026
- 30-year fixed mortgage 7.40 percent, up 74 basis points in eight weeks Freddie Mac weekly survey, week ending October 15, 2026
- Revised NC REALTORS residential forms, including the Form 2-T due diligence fee changes, released May 27, 2026 NC REALTORS summary of 2026 changes to residential forms
How your market should change the number
The cost of a failed contract is not the due diligence period. It is the re-list. In New Hanover County the typical home now takes 61 days to go under contract against 34 a year ago, and in Brunswick County it is 93 days against 64. If a buyer walks on day 21, you are not losing three weeks. You are losing three weeks plus however long the next contract takes to find, in a market where two of every five New Hanover listings have already cut their price and buyers read days-on-market as a signal.
That math points the opposite direction from most sellers’ instincts. In the slower Brunswick market, squeezing the period to protect two weeks of exposure is a poor trade against the risk of losing a qualified buyer. We would rather see a three-week period with a real due diligence fee, so that a buyer who walks has paid for the privilege, than a twelve-day period with a token fee and a buyer who was never going to make the deadline. Our listing services page explains how we structure that trade on the front end, and our Brunswick County market update tracks the pace you are actually pricing against.
One more practical note. Negotiate the repair conversation into the front half of the period, not the back. A buyer who raises inspection items on day nineteen of a twenty-one day period is asking you to decide under a clock, and that is where sellers make expensive concessions. Our post on what repairs are actually worth doing before you list covers how to take the worst of those items off the table before an offer arrives.
The honest limit of all of this is that the due diligence fee is almost never full compensation. On a $464,000 house a typical fee in our market is a small fraction of what a month of carrying costs plus a re-list actually costs you, so a seller who thinks the fee makes them whole is mistaken. A short period also has a failure mode nobody advertises: it pressures buyers into skipping inspections, and a buyer who skipped the inspection is more likely to come apart later over the appraisal or the insurance quote. There is no length that eliminates your risk. There is only the length that gets a well-qualified buyer to closing, and sometimes that means saying yes to an extension you do not love.
Related questions people also ask
Can a buyer in North Carolina extend the due diligence period?
Only if you agree. An extension is a change to the contract, so it takes a written amendment signed by both parties, and you are free to refuse or to ask for something in return, such as an additional due diligence fee or a firmer closing date. In practice the request usually arrives because an appraisal or a specialist inspection is still outstanding, which is information worth hearing before you decide. If you refuse and the buyer cannot complete their lender’s conditions in time, expect them to terminate rather than proceed blind.
Do I keep the due diligence fee if the buyer walks away?
Generally yes. The Real Estate Commission describes the fee as the seller’s compensation for taking the property off the market and as nonrefundable, subject to limited exceptions written into the contract. That is different from earnest money, which is refundable to the buyer if they terminate properly before the period expires. If a buyer terminates after the period has ended, the earnest money question changes, and that is the point at which you want your agent and, if it is contested, a real estate attorney involved.
What is the difference between the due diligence fee and earnest money in NC?
The due diligence fee is paid to you, is generally nonrefundable, and buys the buyer the right to investigate the property during the period. Earnest money is held in trust by a third party, usually the closing attorney or a brokerage, and is credited to the buyer at closing or refunded if the buyer terminates within the due diligence period. Sellers often focus on the earnest money figure because it is larger, but the fee is the amount you actually keep if the deal does not happen, which makes it the more important number to negotiate.
Before you accept an offer, have your agent price the due diligence period against two things: the buyer’s lender timeline and the days on market in your own county. If the period is shorter than the lender needs, raise the fee or lengthen the period rather than planning to fight about it in week three. We do this on every offer we present, and we are glad to walk through a specific offer with you line by line.
Sources: North Carolina Real Estate Commission Bulletin, “Significant Revisions Approved To Offer to Purchase and Contract,” on the Due Diligence Period, the due diligence fee and termination notice. NC REALTORS, Summary of 2026 Changes to Residential Forms, released May 27, 2026, on Form 2-T paragraphs 1(i), 6(e), 8(c) and 22 and Form 355-T. Our New Hanover County, Brunswick County and Pender County market updates, three months ending September 2026. Freddie Mac weekly mortgage market survey, week ending October 15, 2026, via our monthly mortgage update.
