Bridge USDC from Polygon PoS to Arbitrum One: fees compared

Polygon PoS → Arbitrum USDC mixes PoS exit risk with L2 filler markets; history is still short. Polygon PoS is a separate chain with its own validator set, not an Ethereum rollup, so there is no shared canonical bridge to Arbitrum One; every quote relies on a third-party bridge or a Circle burn-and-mint path.

Snapshot #45 (2026-10-24 04:05 UTC), tier by tier

• $20: NEAR Intents 1Click 4.67 bps (ETA 34s), then Across 5.25 bps (ETA 1s), then Relay 12.44 bps (ETA 1s) (19 ranked; 2 reference rows).
• $200: Across 1.43 bps (ETA 1s), then Relay 2.14 bps (ETA 1s), then NEAR Intents 1Click 2.28 bps (ETA 34s) (19 ranked; 2 reference rows).
• $2,000: Mayan FAST_MCTP via Mayan 0.43 bps (ETA 6 min), then Across 1.04 bps (ETA 1s), then Relay 1.11 bps (ETA 1s) (19 ranked; 2 reference rows).

How wide is the USDC spread from Polygon PoS to Arbitrum One?

At $200 the ranked set runs from 1.43 bps (Across) through a median of 26.42 bps to 41.03 bps (Glacis via LI.FI). 5 of 19 ranked quotes cost under 10 bps, so on a $200 transfer the gap between first and last is about $0.79.

Further down the $200 board: #4 Mayan FAST_MCTP via Mayan 4.28, #5 Mayan FAST_MCTP via Mayan 5.86, #6 Polymer (Standard) via LI.FI 25.00, #7 deBridge DLN via deBridge 25.24, #8 Polymer (Fast) via LI.FI 26.00, #9 LI.FI Intents via LI.FI 26.22 (bps).

Best $200 quote per API (rows returned): Across 1.43 bps for Across (1); Relay 2.14 bps for Relay (1); NEAR Intents 1Click 2.28 bps for NEAR Intents 1Click (1); Mayan 4.28 bps for Mayan FAST_MCTP (2); LI.FI 25.00 bps for Polymer (Standard) (12); deBridge 25.24 bps for deBridge DLN (1); Symbiosis 32.07 bps for Symbiosis (1).

Size sensitivity ($20 → $200 → $2,000, bps): Across 5.25 → 1.43 → 1.04; Relay 12.44 → 2.14 → 1.11; NEAR Intents 1Click 4.67 → 2.28 → 2.05.

Platform/integrator fees reported inside quotes on this route: LI.FI 25 bps on 12 row(s); NEAR Intents 1Click 1 bps on 1 row(s).

Quoted arrival ranges from 1s (Across) to 18 min (Polymer (Standard)); these are API estimates, not measured arrivals.

Gas: every bridge on this route is shown with the same source-chain gas estimate — upswap gas basis v1, the median of the quote APIs' own estimates for Polygon PoS USDC in each run. In snapshot #45 it was $0.0074: 3.7 bps of $20, 0.37 bps of $200, 0.037 bps of $2,000, or 1.4% of the median ranked $200 quote (26.42 bps). Gas on Polygon PoS is paid in POL. The estimate is shown in its own column and never folded into bps; Across gas is never counted.

Quoted ETA by row, top 10 at $200 on Polygon PoS → Arbitrum One: Across 1s, Relay 1s, NEAR Intents 1Click 34s, Mayan FAST_MCTP via Mayan 6 min, Mayan FAST_MCTP via Mayan 35s, Polymer (Standard) via LI.FI 18 min, deBridge DLN via deBridge 1s, Polymer (Fast) via LI.FI 10s, LI.FI Intents via LI.FI 9s, Across via LI.FI 1s.

Practical read for USDC Polygon PoS → Arbitrum One

1. The leader changes with size: $20 → NEAR Intents 1Click, $200 → Across, $2,000 → Mayan FAST_MCTP. Pick by the amount you actually move.

2. Relay trails by only 0.72 bps at $200, so ETA (1s vs 1s) or a frontend you trust can reasonably decide it.

3. Over 40 full runs at $200 the cheapest slot went to Across (40); 4 of 14 UTC days are covered, so treat this as a short trail, not a trend.

Open items: no real-money transfer on Polygon PoS → Arbitrum One yet (planned after launch); security notes for these bridges stay unverified until sourced.