diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
new file mode 100644
index 0000000..73a0fe5
--- /dev/null
+++ b/.gitea/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+    branches: [dev]
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.22'
+
+      - name: Vet
+        run: go vet ./...
+
+      - name: Test
+        run: go test ./... -v
+
+      - name: Build
+        run: CGO_ENABLED=0 go build -o main ./cmd/api
diff --git a/.gitea/workflows/deploy-prod.yml b/.gitea/workflows/deploy-prod.yml
new file mode 100644
index 0000000..6327d52
--- /dev/null
+++ b/.gitea/workflows/deploy-prod.yml
@@ -0,0 +1,21 @@
+name: Deploy Production
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.22'
+
+      - name: Build
+        run: CGO_ENABLED=0 go build -o main ./cmd/api
+
+      - name: Deploy
+        run: echo "Production deploy via docker"
diff --git a/cmd/api/main.go b/cmd/api/main.go
index dcbd487..b8d73ea 100644
--- a/cmd/api/main.go
+++ b/cmd/api/main.go
@@ -71,6 +71,7 @@ func main() {
 	profileHandler := handler.NewProfileHandler(userRepo)
 	habitFreezeHandler := handler.NewHabitFreezeHandler(habitFreezeRepo, habitRepo)
 	savingsHandler := handler.NewSavingsHandler(savingsRepo)
+	interestHandler := handler.NewInterestHandler(db)
 
 	// Initialize middleware
 	authMiddleware := customMiddleware.NewAuthMiddleware(cfg.JWTSecret)
@@ -103,6 +104,9 @@ func main() {
 	r.Post("/auth/forgot-password", authHandler.ForgotPassword)
 	r.Post("/auth/reset-password", authHandler.ResetPassword)
 
+	// Internal routes (API key protected)
+	interestHandler.RegisterRoutes(r)
+
 	// Protected routes
 	r.Group(func(r chi.Router) {
 		r.Use(authMiddleware.Authenticate)
diff --git a/internal/handler/interest.go b/internal/handler/interest.go
new file mode 100644
index 0000000..6a06ef5
--- /dev/null
+++ b/internal/handler/interest.go
@@ -0,0 +1,58 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"os"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/jmoiron/sqlx"
+
+	"github.com/daniil/homelab-api/internal/service"
+)
+
+type InterestHandler struct {
+	service   *service.InterestService
+	secretKey string
+}
+
+func NewInterestHandler(db *sqlx.DB) *InterestHandler {
+	secretKey := os.Getenv("INTERNAL_API_KEY")
+	if secretKey == "" {
+		secretKey = "pulse-internal-2026"
+	}
+	return &InterestHandler{
+		service:   service.NewInterestService(db),
+		secretKey: secretKey,
+	}
+}
+
+// RegisterRoutes регистрирует internal routes
+func (h *InterestHandler) RegisterRoutes(r chi.Router) {
+	r.Post("/internal/calculate-interest", h.CalculateInterest)
+}
+
+// CalculateInterest запускает расчёт процентов для всех вкладов
+// POST /internal/calculate-interest
+// Header: X-Internal-Key: <secret>
+func (h *InterestHandler) CalculateInterest(w http.ResponseWriter, r *http.Request) {
+	// Verify internal API key
+	key := r.Header.Get("X-Internal-Key")
+	if key != h.secretKey {
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		return
+	}
+	
+	results, err := h.service.CalculateAllDepositsInterest()
+	if err != nil {
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]string{"error": err.Error()})
+		return
+	}
+	
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(map[string]interface{}{
+		"message": "Interest calculation completed",
+		"results": results,
+	})
+}
diff --git a/internal/health/health_test.go b/internal/health/health_test.go
new file mode 100644
index 0000000..7aecb47
--- /dev/null
+++ b/internal/health/health_test.go
@@ -0,0 +1,10 @@
+package health
+
+import "testing"
+
+func TestHealthCheck(t *testing.T) {
+	status := "ok"
+	if status != "ok" {
+		t.Errorf("expected ok, got %s", status)
+	}
+}
diff --git a/internal/service/interest.go b/internal/service/interest.go
new file mode 100644
index 0000000..89bb385
--- /dev/null
+++ b/internal/service/interest.go
@@ -0,0 +1,123 @@
+package service
+
+import (
+	"fmt"
+	"log"
+	"math"
+	"time"
+
+	"github.com/daniil/homelab-api/internal/model"
+	"github.com/jmoiron/sqlx"
+)
+
+type InterestService struct {
+	db *sqlx.DB
+}
+
+func NewInterestService(db *sqlx.DB) *InterestService {
+	return &InterestService{db: db}
+}
+
+// CalculateAllDepositsInterest проверяет все вклады и начисляет проценты где нужно
+func (s *InterestService) CalculateAllDepositsInterest() ([]string, error) {
+	var results []string
+
+	// Получаем все активные вклады
+	var deposits []model.SavingsCategory
+	err := s.db.Select(&deposits, `
+		SELECT * FROM savings_categories 
+		WHERE is_deposit = true AND interest_rate > 0
+	`)
+	if err != nil {
+		return nil, fmt.Errorf("failed to fetch deposits: %w", err)
+	}
+
+	log.Printf("Found %d deposits to check", len(deposits))
+
+	for _, deposit := range deposits {
+		result, err := s.CalculateInterestForDeposit(&deposit)
+		if err != nil {
+			log.Printf("Error calculating interest for %s: %v", deposit.Name, err)
+			results = append(results, fmt.Sprintf("❌ %s: %v", deposit.Name, err))
+			continue
+		}
+		if result != "" {
+			results = append(results, result)
+		}
+	}
+
+	return results, nil
+}
+
+// CalculateInterestForDeposit рассчитывает проценты для одного вклада
+func (s *InterestService) CalculateInterestForDeposit(deposit *model.SavingsCategory) (string, error) {
+	if !deposit.IsDeposit || deposit.InterestRate <= 0 {
+		return "", nil
+	}
+
+	if !deposit.DepositStartDate.Valid {
+		return "", fmt.Errorf("no start date")
+	}
+
+	now := time.Now()
+	startDate := deposit.DepositStartDate.Time
+
+	// Проверяем не истёк ли срок вклада
+	if deposit.DepositTerm > 0 {
+		endDate := startDate.AddDate(0, deposit.DepositTerm, 0)
+		if now.After(endDate) {
+			log.Printf("Deposit %s expired on %v", deposit.Name, endDate)
+			return "", nil
+		}
+	}
+
+	// День начисления = день открытия вклада
+	interestDay := startDate.Day()
+
+	// Сегодня день начисления?
+	if now.Day() != interestDay {
+		return "", nil
+	}
+
+	// Проверяем не начислены ли уже проценты за этот месяц
+	currentMonth := fmt.Sprintf("%02d.%d", now.Month(), now.Year())
+	searchPattern := "%" + currentMonth + "%"
+	var count int
+	err := s.db.Get(&count, `SELECT COUNT(*) FROM savings_transactions WHERE category_id = $1 AND description LIKE $2`, deposit.ID, searchPattern)
+	if err != nil {
+		return "", err
+	}
+	if count > 0 {
+		log.Printf("Interest for %s already calculated for %s", deposit.Name, currentMonth)
+		return "", nil
+	}
+
+	// Получаем текущий баланс
+	var balance float64
+	err = s.db.Get(&balance, `SELECT COALESCE(SUM(CASE WHEN type = 'deposit' THEN amount ELSE -amount END), 0) FROM savings_transactions WHERE category_id = $1`, deposit.ID)
+	if err != nil {
+		return "", err
+	}
+
+	// Рассчитываем проценты (годовая ставка / 12)
+	monthlyRate := deposit.InterestRate / 12 / 100
+	interest := balance * monthlyRate
+	interest = math.Round(interest*100) / 100
+
+	if interest <= 0 {
+		return "", nil
+	}
+
+	// Добавляем транзакцию
+	description := fmt.Sprintf("Проценты за %s (%.2f%% годовых)", currentMonth, deposit.InterestRate)
+
+	_, err = s.db.Exec(`INSERT INTO savings_transactions (user_id, category_id, type, amount, date, description) VALUES ($1, $2, 'deposit', $3, $4, $5)`, deposit.UserID, deposit.ID, interest, now.Format("2006-01-02"), description)
+	if err != nil {
+		return "", err
+	}
+
+	result := fmt.Sprintf("✅ %s: +%.2f₽ (баланс: %.2f₽)", deposit.Name, interest, balance+interest)
+	log.Printf(result)
+
+	return result, nil
+}