The Index in Throw a Coin rewards players in three ways: a permanent luck bonus that scales with the number of filled entries, a series of cosmetic unlocks that gate new trail effects and aura colours behind section completion, and a small cash bonus each time a new mutation sub-entry is filled. The rewards are layered, so a player who is filling the Index for the luck bonus is also unlocking cosmetics and cash without any extra effort. The Roblox incremental simulator built by The BEST group yet! ships all three reward types in the base game, and none of them have been changed by the World 2 patch, the Mutation Machine patch on July 18, 2026, or the World 3 launch on July 26, 2026.
This page lists every reward tier, every cosmetic unlock, and every cash milestone, with the threshold required to claim each one. The wiki treats the Index rewards as the most cost-effective progression source in the game, because the rewards are permanent and the only input is play time.
The Three Reward Categories
The Index rewards fall into three distinct categories. The first category is the passive luck bonus, which is the main reward and the reason most players fill the Index at all. The second category is the cosmetic unlocks, which are tied to section completion and mutation sub-entry counts. The third category is the cash milestone bonuses, which are one-time payouts for hitting certain completion percentages.
The Index is the in-game collection log that tracks every base item, every mutation variant, and every catalogue entry that the player has discovered or rolled, and it is the primary long-term progression system in Throw a Coin.
Every new base item discovered adds a permanent Luck bonus to the player's total luck stack, and the bonus does not decay with time or progression because the Index is a permanent collection log rather than a time-limited event reward.
Every mutation sub-entry for a known item also adds a Luck bonus on top of the base item bonus, with Divine entries giving the largest single bonus of any sub-entry because the Divine mutation is the rarest practical outcome of any roll.
The 25-entry crossover is the first milestone at which the Index Luck bonus is large enough to noticeably shift drop rates, and the wiki recommends treating this milestone as the first major Index goal.
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Every new base item discovered adds a permanent Luck bonus that does not decay with time or progression, so the bonus compounds as the player continues to roll new items across the game.
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Every mutation sub-entry for a known item also adds a Luck bonus on top of the base item bonus, with Divine entries giving the largest single bonus of any sub-entry because the Divine mutation is the rarest practical outcome of any roll.
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The 25-entry crossover is the first milestone at which the Index Luck bonus is large enough to noticeably shift drop rates, and the wiki recommends this as the first major Index goal for new players.
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The 100-entry, 200-entry, and 408-entry crossovers are the major long-term targets for Index completionists, with each milestone unlocking a new tier of cosmetic reward and a meaningful step up in the Index Luck bonus.
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The Index reward tier is tied to the percentage of entries filled, with the maximum reward at the 408-entry mark that represents a fully completed Index including all 5 mutation sub-entries for every base item.
| Category | Type | Persistence | Source |
|---|---|---|---|
| Passive luck | Multiplier | Permanent | Every filled entry |
| Cosmetic unlocks | Visual effects | Permanent | Section and mutation milestones |
| Cash milestones | One-time payout | Claimed once | 25%, 50%, 75%, 100% base completion |
The three categories are independent, so a player who is filling the Index for the luck bonus is also earning cosmetics and cash without any extra effort. The community rule of thumb is that the cosmetics are the most visible reward (because they show up in every match), the luck bonus is the most useful reward (because it shifts every drop), and the cash milestones are the smallest reward (because they are one-time payouts).
The Passive Luck Bonus
The passive luck bonus is the main Index reward. Every filled entry contributes a chunk of luck to the save, and the chunks stack additively on a sub-linear curve. The community-observed maximum is around 4x at 408 entries, and the curve asymptotes near that value as the number of entries grows. The bonus applies in every world automatically, and switching worlds does not change the bonus.
The bonus is permanent, so a single entry you filled in your first hour of play is still contributing to your luck in your hundredth hour. This is a useful property for two reasons. First, it means every entry you fill is a permanent investment that you never lose, even if you take a break from the game for a few weeks. Second, it means the Index is the safest luck source to invest in, because the other three sources (coin, Luck Multiplier, Perfect Throw) all depend on continuous engagement with the game.
Cosmetic Unlocks by Section
Each of the 24 rarity sections in the Index unlocks a cosmetic effect when the section is fully completed. The cosmetic is a unique trail effect that follows the player's cursor in the game, and the effect's colour matches the rarity of the section. The five Common completions give a basic green trail, the five Uncommon completions give a slightly brighter green trail, and the late-game completions give increasingly rare effects in purple, gold, and rainbow.
| Section | Rarity | Cosmetic Effect | Threshold |
|---|---|---|---|
| 1 | Common | Basic green trail | 5/5 items |
| 2 | Uncommon | Brighter green trail | 5/5 items |
| 3 | Rare | Blue trail | 6/6 items |
| 4 | Epic | Purple trail | 5/5 items |
| 5 | Legendary | Gold trail | 5/5 items |
| 6 | Mythic | Cyan trail | 5/5 items |
| 7 | Cosmic | Light blue trail | 4/4 items |
| 8 | Celestial | Lavender trail | 3/3 items |
| 9 | Eternal | Dark purple trail | 3/3 items |
| 10 | Godly | Bright gold trail | 3/3 items |
| 11-12 | Primordial, Genesis | Bronze trail | 1+2 items |
| 13-18 | Quantum through Nebular | Animated trail | 2 items each |
| 19-24 | Beyond through Galactic | Rainbow trail | 1-2 items each |
The cosmetic unlocks are visible to other players in the same server, so a player with a fully filled Index is recognisable by the rainbow trail that follows the cursor. The wiki has observed that the late-game cosmetics are a status symbol in the community, and players often ask in chat which cosmetics come from which sections.
Mutation Sub-entry Cosmetics
In addition to the section cosmetics, every 50 mutation sub-entries you fill unlocks a special aura effect that surrounds the player's avatar. The aura is a soft glow that pulses in time with the cursor trail, and the colour of the aura depends on the highest mutation tier you have produced. The five auras are: green for Big, blue for Huge, purple for Rainbow, gold for Astral, and rainbow for Divine.
| Sub-entries | Aura Effect | Threshold |
|---|---|---|
| 50 | Green aura (Big) | 50/340 mutation entries |
| 100 | Blue aura (Huge) | 100/340 mutation entries |
| 200 | Purple aura (Rainbow) | 200/340 mutation entries |
| 300 | Gold aura (Astral) | 300/340 mutation entries |
| 340 | Rainbow aura (Divine) | 340/340 mutation entries |
The auras stack, so a player with all 340 mutation sub-entries filled shows the rainbow aura even when surrounded by the other four. The mutation sub-entry cosmetics are the most prestigious visual unlocks in the game, and the wiki treats them as the ultimate Index goal.
Cash Milestone Bonuses
The Index pays out a one-time cash bonus at 25%, 50%, 75%, and 100% base completion. The bonuses scale with the late-game coin cost, so the 25% bonus is small in absolute terms (a few thousand coins) and the 100% bonus is large (tens of millions of coins). The bonuses are claimed automatically the first time you log in after hitting the threshold, so there is no manual claim step required.
| Threshold | Approx. Cash Bonus | When Reached |
|---|---|---|
| 25% (17/68) | ~5,000 | First few hours |
| 50% (34/68) | ~50,000 | First day |
| 75% (51/68) | ~500,000 | First week |
| 100% (68/68) | ~10,000,000+ | First month |
The 100% cash bonus is large enough to be a meaningful boost toward the next coin tier, and the wiki recommends saving it for a high-tier coin purchase. The 25% bonus is small enough that it is best spent on the Mutation Machine as soon as it is available, because the Index returns are higher when the machine is fed early.
The Mutation Sub-entry Cash Bonus
In addition to the base completion bonuses, every 50 mutation sub-entries you fill pays out a smaller cash bonus. The bonuses are much smaller than the base completion bonuses (a few thousand coins each) but they add up over time. A player who fills all 340 mutation sub-entries collects seven sub-entry cash bonuses for a total of around 50,000 coins, which is a small but welcome side reward.
The mutation sub-entry cash bonuses are most useful in the early game, when the cash flow is tight. In the late game, the cash flow is large enough that the mutation sub-entry bonuses are not noticeable, but they are still a free source of coins for players who are filling the Index for the luck bonus anyway.
Section Completion Bonuses
In addition to the cosmetic unlock for filling a section, each section completion also pays out a small luck bonus that is separate from the per-entry luck bonus. The section bonus is fixed per section and does not scale with the rarity of the section. A player who fills the Common section gets the same section bonus as a player who fills the Galactic section, which is a useful equaliser for early-game players.
| Section Type | Section Bonus | Notes |
|---|---|---|
| 5-item section (Common, Uncommon, Epic, Legendary, Mythic) | 1.05x | Each section gives a small boost |
| 6-item section (Rare) | 1.05x | Same bonus, larger section |
| 4-item section (Cosmic) | 1.05x | Same bonus, smaller section |
| 3-item sections (Celestial, Eternal, Godly) | 1.05x | Smaller sections, same bonus |
| 1-2 item sections (late game) | 1.05x | Same bonus, easiest to complete |
The section bonus stacks with the per-entry luck bonus, so a player who fills the Common section gets both the per-entry luck from the five filled entries and the section bonus for completing the section. The section bonus is small (5%) but it is permanent and it applies to every drop in the game, so it adds up over the course of a long session.
The Difference Between Section Bonus and Per-entry Bonus
The per-entry bonus scales with the number of filled entries and follows the sub-linear curve toward the 4x maximum. The section bonus is a fixed 1.05x that is awarded once per section, regardless of how many entries the section has. A 5-item section gives the same section bonus as a 1-item section, so the per-item value of the section bonus is higher for small sections than for large sections.
The wiki recommends treating the section bonus as a side reward and focusing on the per-entry bonus for the main luck investment. The per-entry bonus is larger in absolute terms and it scales with the size of your collection, while the section bonus is a fixed payout that is the same for every player who completes the section.
The 100% Base Index Reward
Reaching 100% base Index completion is the single most rewarding Index milestone. The reward package includes the 100% cash bonus (around 10 million coins), the rainbow cursor trail (the most prestigious cosmetic), and the per-entry luck bonus at its maximum base value. The reward package is enough to make the next coin tier noticeably easier to afford, and it is the milestone that most late-game players are working toward.
| Reward | Value | Notes |
|---|---|---|
| 100% cash bonus | ~10,000,000+ | One-time payout |
| Rainbow trail | Cosmetic | Permanent |
| Per-entry luck | 1.0x | Sub-linear contribution from all 68 base entries |
| Section bonuses | 24 × 1.05x | Permanent, applied to all drops |
The 100% base reward is a strong motivator, and the wiki has observed that players who hit 100% base often continue playing for the mutation sub-entries because the Index becomes a habit. The mutation sub-entries are a longer project than the base entries, but the rewards (auras, luck bonus, cash bonuses) are the same type and the same quality, so the habit transfers naturally.
Frequently Asked Questions
Are the Index rewards permanent?
Yes, all three reward categories (luck, cosmetics, cash) are permanent once earned and never decay or get removed by future updates. The luck bonus never resets, the cosmetics stay unlocked on the save, and the cash bonuses are paid out once and never reclaimed by the game.
Do I get a reward for every entry I fill?
You get a luck bonus for every entry you fill, a cosmetic unlock for every section you fully complete, and a cash bonus at the 25%, 50%, 75%, and 100% base completion thresholds. There is no per-entry cash payout, so the cash bonuses come only at the four milestone points.
What is the most valuable Index reward?
The luck bonus is the most valuable reward in absolute terms, because it applies to every drop in the game and it scales with the size of your collection indefinitely. The cosmetic unlocks are the most visible reward to other players, and the cash bonuses are the smallest reward in the long run.
Can I miss the cash milestone bonuses?
No, the cash bonuses are claimed automatically the first time you log in after hitting the threshold, so there is no risk of missing one. There is no manual claim step required at all, and the bonuses are deposited into your cash balance before you can react.
Do mutation sub-entries give the same rewards as base entries?
The mutation sub-entries give a luck bonus per entry and a cosmetic unlock at 50, 100, 200, 300, and 340 sub-entries. The cash bonuses for sub-entries are smaller than for base entries, but the luck bonus is the same size.