The Complete Glossary of Domain Investing Terms Every Indie Hacker Should Know

As of today, dead.domains has buried exactly 0 projects. That's right - our graveyard is empty. But every indie hacker who has ever bought a domain and abandoned a project knows the feeling: you pay $12 for a .com, build nothing, and let it expire. This glossary is for those of you who want to turn that impulse into something smarter.

What is aftermarket domain buying?

The aftermarket is where previously registered domains are sold. Think of it as the secondary market for domains, like eBay for URLs. Most good domains are already taken, so buying from the aftermarket via auctions or direct deals is normal. On Sedo, the average aftermarket transaction in 2023 was around $2,400, according to their annual report. But you can find deals under $100 if you know where to look.

How does domain appraisal work?

Domain appraisal is an estimated value of a domain. Tools like Estibot or GoDaddy's appraisal give you a number based on keywords, length, TLD, and traffic. They're rough guides - an appraisal of $2,500 doesn't mean you'll get that. I once had a domain appraised at $3,800. Sold it for $150. Don't trust appraisals blindly; use them as a starting point.

What's the difference between premium and standard renewal?

Standard renewal is the normal annual fee you pay to keep a domain. Premium renewal means the registry charges a higher rate - sometimes $100 or more per year - because the domain is in a restricted TLD or has high perceived value. Always check renewal prices before buying. A $20 registration might cost you $120 every year after. That's how you turn a side project into a money pit.

What is domain flipping?

Domain flipping is buying domains with the intent to resell at a profit. It's the real estate of the internet, but with less paperwork. Flips work best with short, memorable, keyword-rich names. The median flip profit reported by NamePros users in 2022 was around $300. But most flips lose money - about 80% of domains never sell, per industry estimates. So buy domains you'd actually use yourself.

What does 'expired domain' mean?

An expired domain is one whose registration wasn't renewed by the owner. After a grace period (usually 30-45 days), it becomes available for anyone to register. Expired domains often have existing backlinks and traffic, which can be valuable for SEO. But they also come with history - you might inherit spam penalties. Check the domain's backlink profile using tools like Ahrefs before picking up an expired gem for $11.

What is a domain appraisal vs. valuation?

These terms get used interchangeably, but appraisal is a formal estimate (often paid), while valuation is a broader concept. Valuation considers factors like brandability, industry trends, and comparable sales. An appraisal from Estibot might give you a number, but a valuation by a human broker can be more accurate. For indie hackers, a $20 appraisal is fine for low-stakes domains. For a serious buy, spend $50-$100 on a professional one from Sedo or Afternic.

What is the 'drop' in domain investing?

The drop refers to the moment an expired domain becomes available for anyone to register. It happens after the redemption period ends - typically 75 days after expiration. Dropped domains are auctioned or released to the public. Services like DropCatch or SnapNames compete to catch them. A single domain can have dozens of bidders. I've seen a 5-letter .com drop with 50+ bids within minutes. It's a bloodbath.

How does domain parking work?

Domain parking is placing ads on a domain you don't use. You earn money when visitors click on those ads. But parking rarely makes serious money unless your domain has high traffic. On Sedo parking, the average RPM (revenue per thousand visitors) is about $2-5. Most parked domains earn pennies a month. If you're parking a domain you hope to sell, you're better off just leaving it blank. Parking can actually lower the domain's perceived value.

What are premium TLDs?

Premium TLDs are top-level domains like .io, .ai, .co, .app, etc., that cost more to register than standard .com. .io domains typically renew for $30-$40 per year. .ai domains can cost $70-$100. They're popular with startups and AI products. But be careful - some premium TLDs have aggressive renewal hikes. Always check the registry's pricing page before buying a non-.com domain for your next project.

What is a domain name system (DNS) in simple terms?

DNS is the phonebook of the internet. It translates a domain name (like google.com) into an IP address computers use to connect. You don't need to be a networking expert to buy domains, but understanding basic DNS management (A records, CNAMEs, MX records) helps you set up email, redirects, and hosting. Most domain registrars provide free DNS hosting. If you're ever stuck, Cloudflare's DNS is free and fast.

What is domain tasting?

Domain tasting is a practice where someone registers a domain, checks if it gets traffic (from typos or other sources), and drops it within the 5-day grace period. It was common in the 2000s but registries cracked down by charging for registration even after a drop. Today it's mostly dead. But the concept is useful: if you're considering a domain, you can register it for a few days to test traffic, just don't expect to get a refund.

What is domain front-running?

Domain front-running occurs when someone monitors searches for domain names and registers them before the searcher can. It's shady but happens. Some registrars have been accused of it. To protect yourself, don't search for domains on registrars' own sites - use whois.net or a privacy-focused tool. I once searched for "sideprojecthelper.com" on a registrar's site, and it was taken within an hour. Coincidence? Maybe. But I now use incognito mode and a different provider for searches.

What is the domain secondary market?

The secondary market is where already-registered domains are sold by individuals or brokers. This is different from primary registration (new domains). The secondary market includes platforms like Afternic, Sedo, and Flippa. Prices vary wildly - from $50 to millions. In 2022, the highest reported domain sale was voice.com at $30 million. For indie hackers, the secondary market is great for finding short, brandable domains that are already expired but not yet dropped.

What is domain monetization?

Domain monetization means making money from a domain without selling it. Options include parking (ads), affiliate links, or building a mini-site. Monetization is rarely profitable for average domains. The top 1% of parked domains earn 90% of the revenue, according to Sedo. If your domain isn't getting thousands of visitors, you're better off selling it or letting it expire. Monetization is a side hustle, not a primary income source.

What is domain expiry grace period?

After a domain expires, most registrars offer a grace period (typically 30 days) where you can renew it at the regular price. After that, it enters a redemption period (30-45 days) where you can still renew but at a higher fee ($50-$100). If you miss that, the domain drops. Always set auto-renewal. I learned this the hard way - lost a 5-year-old domain because I forgot to update my credit card. Recovering it cost $85. Set a calendar reminder.

What is domain privacy protection?

Domain privacy (also called WHOIS privacy) hides your personal contact information from public WHOIS databases. ICANN requires registrars to display this info, but privacy services replace it with generic data. Most registrars include it for free now. If you're domain investing, use privacy. Otherwise, you'll get spam calls, emails, and even physical mail from people trying to buy your domain. I once got a letter from a guy in Florida offering $500 for a domain I wasn't even selling. Privacy would have prevented that.

What is domain renewal price risk?

Renewal price risk is the chance that your domain's annual fee will increase significantly. This is especially common with new TLDs or premium domains. For example, a .work domain might register for $1 the first year but renew at $25. Some .loan domains renew at $100. Always check the renewal price before buying. A domain that costs $10 first year might look cheap, but if it renews at $50, your cost of holding it for 5 years is $250 - not $50.

How does domain valuation factor into flipping?

Valuation is critical for flipping. You need to estimate what a buyer will pay, not just what Estibot says. Factors: domain length (shorter is better), keyword popularity, TLD (.com is king), and current trends. A 6-letter .com with a common word might be worth $500-$5,000. A 10-letter hyphenated .org might be worth $0. I always check comparable sales on NameBio before buying. If similar domains sold for under $100, I pass.

What is domain investing glossary essential for indie hackers?

This glossary covers the key terms you'll encounter. But the real lesson? Most domains don't sell. Most side projects die. If you have a domain you're not using, don't let it renew indefinitely. You can bury your dead project on dead.domains for $9 - cheaper than another year of renewal fees. And if you're in the market for a domain, browse the graveyard for cheap, meaningful names from other people's abandoned ideas.