Here at The TCG Times, we get asked some version of the same question almost every week: “What do you think my collection will be worth in a few years?” It’s a great question, and honestly, it is the right question to be asking, lets be honest, most of you reading are collectors looking to be investors and make some cash! The equally honest answer is that no one can know for certain. The TCG market is volatile, driven by forces that even the most seasoned investors can’t fully model. There’s no Warren Buffett of collecting we can lean on, and anyone claiming to predict the future with precision is selling something (and probably not cards, it’s probably buillsh*t).
But “we don’t know” isn’t a satisfying answer, and it isn’t a useful one either. What we can do is apply the same logic that financial planners use every single day, and build a data-informed projection of where your collection might be headed, a tactical guesstimation if you will. That is exactly what our collection growth calculators are built to do. And in this article, we are going to walk you through the thinking behind them, because understanding the logic makes you a better investor, not just a better user of the tool (the tool is the easy part). We built these calculators as a bit of fun for our own collections, then decided to add them to the site to share with our readers. And they are FREE!
The Concept: Compound Growth in Plain Language
The engine behind our calculators is a concept called compound growth, and if you are not already familiar with it, it might just be the most important financial principle you will come across in this hobby. The idea is simple: your collection grows in value each year, and then in the following year, the growth is applied to the already grown value, not the original starting number. It is the snowball effect. The longer it rolls, the bigger it gets.
Here is a quick example. Say your collection is worth $10,000 today and it grows at 7.5% per year. After Year 1, it is worth $10,750. In Year 2, that 7.5% is applied to $10,750, not the original $10,000. By Year 5, without adding a single new card, you are looking at approximately $14,356. Now start reinvesting a portion of that annual growth back into your collection, and the number gets significantly more interesting, as you will see when you run it through the calculator yourself. If you can understand this, you have the basics to expand your investment portfolio, besides just cards.
Breaking Down the Inputs
We currently have five calculators live on The TCG Times: Pokémon, Yu-Gi-Oh, MTG, One Piece, and Dragon Ball. Each is built around the same core inputs, with default growth rates incorporated into the historical performance of that specific market. Here is what each field is actually asking:
- Current Collection Value: Your starting point. Be realistic here. Use current market value, not what you paid for the cards and definitely not what you wish they were worth. Check recent sold listings to get a real number or use the Colloctr app.
- Annual Investment (Optional): Any new money you plan to put into cards each year. Even a modest, consistent figure here has a meaningful long-term impact thanks to compounding. Think of it as dollar-cost averaging into your own portfolio.
- Investment Horizon (Years): How long you plan to hold. The longer you extend this number, the more dramatic the compounding effect becomes. This is the most underappreciated lever in the whole calculator.
- Default Annual Growth Rate (%): This is pre-populated based on historical year-on-year data for each game. For Pokémon, for example, we use 7.5% as the default, which reflects the long-term average. You can absolutely adjust this up or down based on your own outlook for the market. The default is a starting point grounded in data, not a guarantee. We recommend leaving this as is.
- Reinvest Annual Growth (%): This is the one most people either overlook or underestimate. It represents the portion of your collection’s annual growth that you actively reinvest back into acquiring more cards. Set it at 50%, and you are effectively telling the calculator: “Half of what I gain each year, I put back in.” This is where the gap between the solid and dashed lines on the output chart really begins to open up — and it can be eye-opening.
Why Different Games (TCGs) Have Different Growth Rates
Each TCG in our calculator suite carries a different default growth rate, and that is not arbitrary. It reflects the distinct market dynamics of each game.
Pokémon has the longest and most well-documented track record of any TCG on the secondary market, its been in the TCG for a LONG time (probably older than most of the people reading this). Decades of consistent demand, a global collector base, and a brand that keeps pulling in new and returning collectors gives it a relatively stable long-term floor. MTG tells a compelling story particularly around Reserved List cards and the Commander format, which continues to drive sustained demand for older singles. Yu-Gi-Oh has historically been more volatile, which cuts both ways… bigger short-term swings but a passionate, global community that has kept the game relevant for over two decades (cause they actually play the card game).
One Piece and Dragon Ball Super are the newest additions to our calculator suite, and both sit at a genuinely exciting inflection point right now. High collector enthusiasm, growing international market presence, and price points that are still accessible compared to where they could be heading, although Once Piece is gaining tracking QUICK. The floor on both is still being established, which means the upside is arguably more significant and the risk is proportionally higher too. We will always be transparent about that.
The Reinvestment Question: Are You Actually Playing the Long Game?
One of the most interesting things about running your numbers through the calculator is what the reinvestment field reveals about your actual investing behaviour. It is easy to say you are in it for the long haul, just remember for a lot of the Pokémon and some MTG investors, the long haul was luck, they move past the hobby, forgot about the gold mine they had in a shoe box, then boom. It is another thing entirely to consistently take a portion of your gains and put them back into the portfolio rather than spending them, this takes a lot more skill and watching market trends.
The collectors who build genuinely impressive collections over time are almost always the ones treating their gains as fuel rather than reward, this is reinvestment. If you find yourself setting the reinvestment rate to 0% because that is the honest answer, that is fine, it just tells you something useful about where you currently are versus where you want to be.
This ties directly into a concept we covered in depth in our piece on FOMO and market psychology. The calculator models the long game with discipline. FOMO is the noise you need to tune out while you play it.
The TCG Times’ Verdict: Know Your Numbers
We are genuinely passionate about this here at The TCG Times. We ourselves are collectors and investors, it’s not just about cards, but about making sure the people who collect them have access to the same kind of data-driven thinking that traditional investors take for granted. Every collector who considers themselves an investor should have a clear-eyed view of where their portfolio might be headed. Not because the projection is guaranteed, it absolutely is not, but because having a number in mind changes how you make decisions. It shifts your thinking from “I collect cards” to “I hold assets.” And that shift matters more than most people realise.
Head over to whichever calculator matches your game of choice, put in your real numbers (MARKET VALUE!), and see what 2030 might actually look like. You might be pleasantly surprised by what a few years of compounding can do.
Pokémon Collection Value Estimator | Yu-Gi-Oh Collection Value Estimator | MTG Collection Value Estimator | One Piece Collection Value Estimator | Dragon Ball Collection Value Estimator
Disclaimer: The TCG Times is a news and educational platform. All content provided is for informational purposes only and should not be construed as professional financial advice. Trading cards are high-risk, volatile assets. Past performance is not indicative of future results. Always perform your own due diligence before making any financial decisions.
