OpenRouter Top-Up Fees: What $100 in Credits Actually Costs
OpenRouter charges a fee when you buy credits. See the card and crypto fee math, the minimum fee, and how fee-free prepaid alternatives compare.
OpenRouter charges a platform fee when you purchase credits. As of July 14, 2026, the published pricing is 5.5% for card purchases, subject to a $0.80 minimum, and 5% for cryptocurrency purchases. OpenRouter says it does not mark up the underlying model price; the fee happens at the point where money becomes platform credit.
That distinction matters because a page showing vendor list price can still cost more than vendor list price once the credit-purchase fee is included.
Source and verification date: OpenRouter FAQ, checked July 14, 2026. Pricing can change, so verify the current checkout before making a large purchase.
The $100 fee math #
| Payment route | Usable model credit | Purchase fee | Total paid |
|---|---|---|---|
| OpenRouter card | $100.00 | $5.50 | $105.50 |
| OpenRouter crypto | $100.00 | $5.00 | $105.00 |
| RouterPlex card or crypto | $100.00 | $0.00 | $100.00 |
The arithmetic is simple: multiply the credit amount by the purchase-fee rate, then add that fee to the amount charged.
$100.00 credit × 5.5% card fee = $5.50 fee$100.00 credit + $5.50 fee = $105.50 charged
For a small card top-up, the minimum matters more. A 5.5% fee on $5 would be $0.275, but a $0.80 minimum means the effective fee is much higher on that purchase. You would pay $5.80 to receive $5.00 in credit, an effective cost of 16% relative to the usable credit.
A purchase fee is not a token markup #
It is useful to separate three numbers when comparing an LLM gateway:
- Model rate: the input and output token price shown for a model.
- Purchase fee: the amount charged to turn dollars into gateway credits.
- Operational extras: logging, routing, observability, or support products that may have separate prices.
Two gateways can show the same Claude or GPT token rate while producing different total costs. If Gateway A charges $105.50 for $100 of credit and Gateway B charges $100 for $100 of credit, Gateway A is effectively 5.5% more expensive before a single token is generated.
This is why comparisons based only on a model table are incomplete. Follow the money from payment method to usable balance.
What the fee costs over time #
The dollar amount becomes more visible once usage is recurring.
| Credits purchased per month | 5.5% monthly fee | Fee over 12 months |
|---|---|---|
| $20 | $1.10 | $13.20 |
| $100 | $5.50 | $66.00 |
| $500 | $27.50 | $330.00 |
| $1,000 | $55.00 | $660.00 |
This is not a claim that OpenRouter is always the wrong choice. It has a broad catalog and mature routing features that may justify the fee for a particular team. The point is to include the purchase fee in the comparison instead of treating it as invisible.
How RouterPlex handles top-ups #
RouterPlex uses a prepaid balance with no top-up fee and no model markup. Pay $5 and the account receives $5 in usable credits. Pay $100 and it receives $100.
The tradeoff is explicit: RouterPlex is focused on one OpenAI-compatible endpoint, a curated multi-provider catalog, and spend controls. It is not trying to reproduce every feature of every larger gateway.
Each API key can have its own hard lifetime budget. That lets you create separate keys for a coding agent, production app, evaluation job, or client without giving each workload access to the entire account balance. See the full model price list and the detailed RouterPlex vs OpenRouter comparison.
A practical comparison checklist #
Before choosing a gateway, record these numbers for your actual workload:
- The amount charged to receive $100 in usable credit.
- The input and output price of the models you use most.
- Whether unused credit expires.
- Whether a balance can become negative.
- Whether keys support a hard server-side spend limit.
- Whether switching away requires code changes beyond a base URL and key.
The cheapest-looking token table is not necessarily the lowest total cost. The useful question is: how many usable model dollars arrive after payment, and how tightly can you cap the downside?
Start with the smallest real test #
For a self-serve API, a paid $5 test is more informative than a feature matrix. Create one key with a $5 budget, run the same prompt set against the models you care about, and inspect latency, output quality, and the final balance.
Start RouterPlex with a $5 top-up, or compare every published rate in the model catalog.
Frequently asked questions
Does OpenRouter mark up model token prices?
OpenRouter says it does not mark up the underlying provider price. Its platform fee is charged when credits are purchased, which is separate from the per-token model rate.
How much does $100 of OpenRouter credit cost by card?
At a 5.5% purchase fee, $100 of usable credit costs $105.50. Re-check the current checkout and OpenRouter documentation before purchasing because fees can change.
Does RouterPlex charge a top-up fee?
No. A $100 RouterPlex top-up adds $100 in usable prepaid credits. Published model rates are vendor list prices with no additional markup.
Run the smallest paid test.
Add $5, cap the key, and verify the result with your own workload.