Renewal Costs and Sell-Through Rate: The Real Math of Domaining

Every domain you hold sends you a bill once a year. That single fact is the gravity every domain investor lives under, and it's the part the success stories leave out. A five-figure sale makes a great headline. The two hundred names that didn't sell, quietly drawing a renewal fee apiece every twelve months, never make it into the story.

This piece is about that quieter half of the ledger. It walks through the two numbers that actually decide whether a domain portfolio makes money: what it costs to carry names year after year, and how many of them you can realistically expect to sell. Get honest about both and the whole business stops looking like a lottery and starts looking like what it is — an inventory operation with a steady carrying cost and a small number of outsized wins. This is the math behind domain flipping, and it's the foundation under domain portfolio management.

You don't own a domain, you rent it

Start with the thing that makes domaining different from buying baseball cards or art: you never own a domain outright. You hold it for a registration term and you keep it only by paying to renew. Miss the renewal and the name leaves your control on a fixed schedule.

The term has a ceiling. Per Wikipedia, the maximum period of registration for a gTLD domain name is 10 years, so even if you pay as far forward as the system allows, the clock restarts at least once a decade. Most investors renew annually, which means the bill arrives every year on every name. The work of deciding which names earn another year is the job at the center of when to drop a domain — and it never stops.

The renewal isn't a formality, either. Let it lapse and the name doesn't vanish instantly, but it does start a countdown you don't control. After expiry a name typically enters a redemption window — which, as the domain drop-catching literature notes, varies by TLD, and is usually around 30 to 90 days and lets you recover it for a stiff fee — and after that a short final phase before release: at the end of the "pending delete" phase of 5 days, the domain will be dropped from the ICANN database. Once it drops, anyone can register it. A name you forgot to renew can be a name a competitor catches at the drop auction the same week.

What renewal actually costs

A single .com renewal looks trivial. Wikipedia puts the retail range plainly: as of 2023, the retail cost generally ranges from a low of about $9.70 per year to about $35 per year for a simple .com registration. Ten dollars. Forgettable on one name.

It is not forgettable on three hundred. That same ten-dollar bill, multiplied across a real portfolio, becomes the single largest line item in the operation — the number every serious domainer organizes the whole year around. A 300-name .com book running near the floor of that range is roughly $3,000 a year in renewals alone, and that's before you've spent a dollar acquiring anything new. The cost scales linearly with how many names you hold and not at all with how many of them are any good. Renewal drag doesn't care whether a name is a future five-figure sale or a typo you should have dropped two years ago.

Two forces push that number up over time, and both work against you. First, the wholesale price under your retail price keeps climbing. When Verisign announced its 2024 increase, the registry currently charges registrars $9.59 per year for .com registrations. That will increase to $10.26, and under the registry contract Verisign is allowed to increase prices by 7% in each of the last four years of its term. A compounding 7% means the floor under your renewal bill ratchets upward whether or not any of your names appreciate. Second, the bill grows every time you acquire faster than you sell — and most investors acquire faster than they sell, because buying is the fun part.

Extension choice changes the picture, too. The conventional .com floor is one thing; a premium extension like .io or .ai often renews for many times that, while a discount .xyz may renew cheaply but resell rarely. A portfolio of expensive-to-renew extensions needs a correspondingly higher sale rate just to break even. The registrar you choose matters at the margin as well, since renewal pricing is where registrars quietly differ most.

Sell-through rate: the number nobody can prove

Here is the second half of the math, and the honest part. Against that steady renewal cost you set your sell-through rate — the share of your portfolio that actually sells in a given year. It's the metric that decides everything, and it's also the one with no authoritative source.

Treat any specific figure you see as an estimate, not a measured statistic. The widely repeated rule of thumb for a hand-registered portfolio is a sell-through rate in the low single digits per year — often cited around 1% to 2%. We're flagging that as a community rule of thumb, not sourced fact: there is no neutral registry that publishes portfolio sell-through across all domainers, the number swings wildly with the quality of the names and the channel they're listed on, and the people quoting it are usually quoting each other. Anyone who hands you a precise sell-through percentage as gospel is selling confidence they don't have.

What you can trust is the shape of the number, which everyone in the business agrees on. Sell-through for speculative, hand-registered names is low — a small fraction of a portfolio moves in any given year, and the rest sits and renews. That low rate is structural, not a sign you're doing it wrong. It's a direct consequence of how the aftermarket works: most names appeal to a tiny set of buyers, and in any given year most of those buyers aren't shopping. A name can be genuinely good and still not sell for years simply because the one company that needs it hasn't had its naming meeting yet.

The fix isn't to chase a higher percentage by listing junk. It's to know your own number. Track how many names you actually sold last year against how many you held, and you have a real sell-through rate for your portfolio and your sourcing — worth more than any industry average. That tracking is the discipline at the heart of portfolio management, and it's the input every other decision depends on.

One sale funds many renewals

Put the two numbers together and the entire economics resolve into a single sentence experienced domainers repeat like a mantra: one sale funds many renewals.

The arithmetic is unforgiving but simple. If your portfolio sells 1% to 2% of its names in a year, you are paying renewals on 98% to 99% of a book that produced no revenue. The model survives only because the price of a sale is wildly out of scale with the cost of a renewal. One name that resells for $2,000 covers the annual renewal on roughly two hundred .coms at the low end of that retail range. A single four- or five-figure sale can carry a large portfolio for a year or more — which is precisely why the trade works at all.

This is why domaining is a portfolio game and never a single-name bet. You are not trying to win on each name; you are trying to make sure the rare winners are big enough, and frequent enough, to outrun the renewal drag on everything that doesn't sell. Frame it as a break-even and the test gets concrete: your expected annual sales revenue has to clear your total annual renewal bill with room to spare, or you don't have an investment — you have a subscription you keep paying for the privilege of hoping.

That framing also explains why pricing and selling matter more than acquiring. A portfolio with a mediocre sell-through but disciplined pricing — names that, when they do sell, sell for real money — beats a portfolio with a great hit rate of low-value sales. The leverage is in the size of the wins, which is why the selling craft in how to sell a domain name you own sits at the revenue end of the whole operation.

Running the math like a business

If you treat domaining as a business rather than a hobby, three habits keep the math honest.

Know your cost basis and holding cost per name. Cost basis is what you paid to acquire; holding cost is every renewal you've paid since. A name you've renewed for six years has a much higher real cost than its sticker price, and that accumulated holding cost is what should drive the keep-or-drop call. Tracking it is also what makes tax time tractable — see taxes and accounting for domain investors for why cost basis and holding period are the numbers your accountant will ask for first.

Prune ruthlessly and on schedule. The single highest-leverage move against renewal drag is dropping names that will never sell, before the renewal hits, not after. Every name you let go is a renewal you don't pay forever. The instinct to hold "just one more year" in case a name finally moves is exactly how a portfolio turns into a money pit. When to drop a domain is the discipline that protects your winners from being subsidized into the red by your dead inventory.

Offset carry where you can, but don't count on it. Some investors park unsold names to recover a little of the renewal cost. As the domaining literature notes, registrars allow unused domains to be parked with the registrant receiving a share of the PPC revenue earned. For the typical brandable name with no type-in traffic, parking revenue is rounding-error money and won't move your break-even — but on names that do draw traffic it can quietly cover a slice of the renewal bill. Treat it as a small offset, not a strategy.

Do all three and the renewal bill stops being a vague dread and becomes a managed number you can forecast against expected sales. That forecast is the difference between investing and hoarding.

Where the mechanics meet the math

The economics above decide whether to hold a name. The other half of every flip is the mechanics of moving it when a sale finally lands — and that's where a hard-won sale can still slip. High-value transfers carry the classic standoff: the seller won't hand over the name before payment, the buyer won't pay before delivery, which is the whole reason escrow exists. We walk that workflow in domain escrow explained.

Namefi narrows that friction at the settlement step. Tokenized ownership makes control of a real ICANN domain easier to verify and transfer, with DNS continuity so a live name keeps resolving through the handover. For the math in this article, less settlement friction means the rare sale that's supposed to fund a year of renewals is more likely to actually close — and a sale that closes cleanly is the only kind that pays the bill.

Friendly Disclaimer (Read Me!)

We're not lawyers, accountants, financial advisors, or doctors, and nothing in this article is legal, financial, tax, accounting, medical, or any other flavor of professional advice. We write these posts to educate ourselves and as a convenience for our customers. Info here may be out of date, geography-specific, or just plain wrong. We make mistakes too.

For any important decision, please consult a real professional (seriously!). Or if that's not your vibe, ask a friend, ask Twitter, ask Reddit, ask an AI, or ask a psychic. In short: DOYR - Do Your Own Research. Let's learn and have fun.

Sources and further reading

• Wikipedia — Domain name registrar (10-year max gTLD term; retail .com renewal pricing)
• Wikipedia — Domain drop catching (redemption window of ~30–90 days; 5-day pending-delete phase)
• Domain Name Wire — Verisign .com wholesale price increase to $10.26 (7% annual cap under the registry contract)
• Wikipedia — Domain name speculation (parking and PPC revenue share on unused domains)