Economy

Gold is the only resource in TFT that grows on its own. Everything in this guide follows from that one sentence. HP does not regenerate, XP does not accrue faster because you have more of it, and items do not multiply. Gold above 10 pays you every round for the privilege of not spending it, and the players who climb out of Emerald are, almost without exception, the ones who stopped treating that payment as optional.

Interest and the 50 gold floor

Interest is paid at the start of every round on the gold you were holding at the end of the previous one, at the rate in the table above, capped at 5. Read the cap as the design's message: the game wants you to reach 50, and it stops rewarding you beyond it. So 50 is not a target you approach carefully. It is a floor you get under as fast as you can and then stand on.

The compounding is not dramatic on any single round. The difference between 40 and 50 banked is 1 gold. The reason it matters is duration. If you reach 50 at 3-2 instead of 4-1, that is five rounds at +1 gold, which is 5 gold, which is a fifth of a level-8 rolldown. If the reason you reached 50 late was that you rolled twice at 3-1 for "a little upgrade", you paid 4 gold for the rolls, lost 1 interest for several rounds because you were sitting at 46 instead of 50, and arrived at your rolldown 8 to 10 gold lighter. Ten gold is five rolls at the level where they matter.

Standard play reaches 50 somewhere between 3-2 and 3-5 on a neutral start: base income 5, a couple of streak gold, and buying only the units that go on the board. You get there faster with a strong streak in either direction and slower if you had to buy pairs to stabilise. Where you land in that window matters less than getting there without a detour.

Above 50

Once you are at 50, every gold beyond it is dead money until you spend it. The next question is not "how do I get to 60" but "when do I spend the surplus": on a level, or on the rolldown. A player sitting at 70 gold at 4-5 with a losing board has not "econ'd well"; they have misplaced twenty gold that should have become units three rounds ago. See when to break 50.

The real cost of a roll

A roll costs 2 gold. That number is why Emerald players roll: two gold feels like nothing. It is the wrong number to think about.

The right number is what the roll does to your tempo. A roll at 3-1 at level 5 shows you a shop that is 45% one-costs and 33% two-costs. The units that actually change your board at that point, a second copy of your 3-cost or a 4-cost you can hold, appear in roughly one slot every five rolls. So the realistic outcome of "rolling a little" is that you spend 6 to 8 gold to see one relevant unit, which you then may or may not be able to afford to buy.

Now compare that to what 8 gold does at 4-2 at level 8, where 4-costs are 30% of every slot and you are rolling for a specific pair. The same 8 gold is four rolls with a real chance of the hit that decides your game. Every early roll is a late roll you no longer have, at worse odds.

There is a second, hidden cost. Rolling early means buying units you find, which means selling units later, which means paying the 1-gold tax on every 2-cost and the full price on every 3-cost you sell back. A board built from early rolls is a board that leaks gold every time it changes.

Loss-streaking on purpose

Loss-streaking is a legitimate econ plan, not a consolation. The streak gold in the table above pays the same whether you win or lose, and a loss streak has two advantages over a win streak: it is easier to guarantee (you control losing far more than you control winning), and it puts you first on the carousel from 2-4 onward.

The plan works like this. You open with a weak board on purpose, or you accept the weak board you were given, and you do not spend gold trying to fix it in stage 2. You reach 50 at 3-1 or earlier, keep the loss streak through 3-2 (taking the augment that fits a strong stage 4), and then convert: level to 7 or 8 at 3-5 or 4-1 with a large surplus, roll for a board that is a full stage ahead of the players who were winning small fights on 2-star 2-costs.

The plan has an exit condition and it is HP. Loss-streaking works because stage 2 and early stage 3 damage is low: a few HP per loss. Somewhere around 3-5 the per-loss damage climbs sharply and a 6-loss streak stops being cheap. The exit condition is: you must be converting by the round the damage curve turns, which in a standard lobby is 3-5 to 4-1. If you are still at 8 units of nothing at 4-2, you did not loss-streak, you just lost.

Three legitimate reasons to break 50

Breaking the 50 floor means dropping below it and staying below it, so that you lose interest on the following rounds. There are exactly three reasons to do it.

1. You are about to die. Interest is worth 5 gold a round; being alive is worth the game. If your HP puts you within two losses of elimination, gold in the bank is not econ, it is a bad bet. Roll and stabilise. The HP guide has the thresholds.
2. You are executing a rolldown you planned. The whole point of holding 50 through stage 3 was to arrive at 4-2 or 4-5 with 60 to 80 gold and level 8. Spending that gold is the plan working. The tell that it was planned: you know your gold floor and your stop condition before you press D. See rolldown discipline.
3. You have a board that wins now. If you have hit and your board is beating the lobby, leveling to 9 early or slamming the last items turns the win streak into 3 gold a round and HP damage to everyone else. A capped board gains more from a level than from interest.

Every other reason is a rationalisation. "I want to see if I hit" is reason 2 without a plan. "I feel weak" is reason 1 without checking the HP. "I want to keep my streak" is reason 3 without a board that actually wins.

Roll a little each round

This is the single most expensive habit at Emerald, and it is expensive precisely because it never feels expensive. Two gold at 2-5. Two gold at 3-1. Four gold at 3-3 because you were close. Two gold at 3-6. By 4-2 the habit has cost 10 gold in rolls and 8 to 12 in lost interest, and the player who did it arrives at the rolldown with 45 gold instead of 65, at level 7 instead of 8, and rolls at 16% four-cost odds instead of 30%.

The habit persists because each individual roll sometimes works. You find a pair, you two-star something, the board looks better, and the brain files "rolling helped". What it does not file is the round at 4-3 where you had no gold to save the game.

The replacement habit is binary: you are either saving or you are rolling down. Saving means zero rolls, buying only units that go on the board or are pairs of units already on it. Rolling down means a specific target, a gold floor and a stop, executed at one moment. There is no third mode where you roll a couple of times to see. If you catch yourself pressing D without a target, that round was a saving round and you just broke it.