diff --git a/app/config.py b/app/config.py
index 3abea11..9c74667 100644
--- a/app/config.py
+++ b/app/config.py
@@ -194,6 +194,7 @@ class Settings(BaseSettings):
     # Kostenerfassung Stufe 2 (geschätzte Quellen). Siehe Docs/kosten-erfassung.md.
     usd_per_eur: float = 1.08              # Umrechnung EUR-naher Schätzungen in die USD-Anzeige
     cartesia_usd_per_char: float = 0.00005  # Cartesia: 100k Credits ≈ 100.000 Zeichen → $5
+    openrouter_tts_usd_per_char: float = 0.000015  # OpenRouter-TTS (Schätzung, ≈ $15/1M Zeichen) — an Modellpreis anpassen
     emergency_alert_eur: float = 0.20       # SMS+Voice pro Alarm (Schätzung)
     # Lokales LLM: Stromkosten pro Anfrage (marginal über Leerlauf), 2× RTX 3090.
     gpu_idle_watts: float = 40.0            # Leerlauf je GPU = Infrastruktur (nicht pro Anfrage)
diff --git a/app/core/costs.py b/app/core/costs.py
index 350d1ba..0d0ade0 100644
--- a/app/core/costs.py
+++ b/app/core/costs.py
@@ -102,6 +102,17 @@ def cartesia_usd(n_chars, cfg=None) -> float:
     return max(0, n) * cfg.cartesia_usd_per_char
 
 
+def openrouter_tts_usd(n_chars, cfg=None) -> float:
+    """OpenRouter-TTS-Kosten (USD) fuer `n_chars` (Schaetzung — der Audio-Endpunkt
+    liefert keine inline-Kosten wie der Chat-Endpunkt)."""
+    cfg = _cfg(cfg)
+    try:
+        n = int(n_chars or 0)
+    except (TypeError, ValueError):
+        return 0.0
+    return max(0, n) * cfg.openrouter_tts_usd_per_char
+
+
 def eur_to_usd(eur, cfg=None) -> float:
     cfg = _cfg(cfg)
     try:
diff --git a/app/pipeline/fillers.py b/app/pipeline/fillers.py
index 9ccbe0b..c7a246a 100644
--- a/app/pipeline/fillers.py
+++ b/app/pipeline/fillers.py
@@ -17,6 +17,8 @@ import re
 
 import httpx
 
+from app.core.costs import record_openrouter_cost
+
 logger = logging.getLogger(__name__)
 
 ENDPOINT = "https://openrouter.ai/api/v1/chat/completions"
@@ -107,13 +109,15 @@ def make_openrouter_translator(api_key: str, model: str):
             f"no quotes, no extra words. Output ONLY a numbered list of the translations."
             f"\n\n{numbered}"
         )
-        payload = {"model": model, "temperature": 0.4,
+        payload = {"model": model, "temperature": 0.4, "usage": {"include": True},
                    "messages": [{"role": "user", "content": prompt}]}
         headers = {"Authorization": f"Bearer {api_key}", "Content-Type": "application/json"}
         async with httpx.AsyncClient(timeout=httpx.Timeout(30.0)) as client:
             resp = await client.post(ENDPOINT, json=payload, headers=headers)
             resp.raise_for_status()
-        text = resp.json()["choices"][0]["message"]["content"]
+        data = resp.json()
+        record_openrouter_cost(data.get("usage"), "llm")
+        text = data["choices"][0]["message"]["content"]
         return _parse_numbered(text, len(phrases))
 
     return translate_pool
diff --git a/app/providers/tts/openrouter.py b/app/providers/tts/openrouter.py
index dda8e5f..5ffa6a0 100644
--- a/app/providers/tts/openrouter.py
+++ b/app/providers/tts/openrouter.py
@@ -2,6 +2,7 @@ import asyncio
 
 import httpx
 
+from app.core.costs import add_cost, openrouter_tts_usd
 from app.providers.tts.base import TTSProvider
 
 # Preview-TTS-Modelle liefern gelegentlich HTTP 200 mit LEEREM Body oder ein
@@ -70,6 +71,9 @@ class OpenRouterTTSProvider(TTSProvider):
                     raise RuntimeError(f"OpenRouter TTS transport error: {exc}") from exc
                 else:
                     if response.content:
+                        # Geschätzte TTS-Kosten (Zeichen × Preis); Audio-Endpunkt
+                        # liefert keine inline-usage.
+                        add_cost(openrouter_tts_usd(len(text.strip())), "tts")
                         return response.content
                     # HTTP 200 mit leerem Body -> transienter Aussetzer, erneut versuchen.
 
diff --git a/app/runtime_config.py b/app/runtime_config.py
index 60c66b1..7229f40 100644
--- a/app/runtime_config.py
+++ b/app/runtime_config.py
@@ -39,6 +39,7 @@ RUNTIME_SETTABLE: dict[str, tuple[str, str, str]] = {
     "electricity_price_eur_per_kwh": ("Strompreis (€/kWh)",            "float", "Kosten lokaler LLM-Anfragen (z.B. 0.33)"),
     "emergency_alert_eur":           ("Notruf-Kosten (€/Alarm)",       "float", "SMS+Anruf pro Alarm (z.B. 0.20)"),
     "cartesia_usd_per_char":         ("Cartesia-TTS ($/Zeichen)",      "float", "z.B. 0.00005 (100k Credits ≈ 100.000 Zeichen)"),
+    "openrouter_tts_usd_per_char":   ("OpenRouter-TTS ($/Zeichen)",    "float", "Schätzung, z.B. 0.000015 — an Modellpreis anpassen"),
     "emergency_cooldown_minutes":    ("Notruf-Sperre (Minuten)",       "int",   "Erneuter Alarm für N Minuten blockiert (Standard 5, 0 = aus)"),
 }