diff --git a/projects/update-ynab/banks/banks.go b/projects/update-ynab/banks/banks.go
index bb186c4..6595c49 100644
--- a/projects/update-ynab/banks/banks.go
+++ b/projects/update-ynab/banks/banks.go
@@ -11,15 +11,7 @@ import (
 	"github.com/shopspring/decimal"
 )
 
-func LoadBankTxs(db *sqlx.DB) ([]types.BankAccountWithTransactions, error) {
-	var fromMonth time.Time
-	if time.Now().Day() <= 10 {
-		year, month, day := time.Now().Date()
-		fromMonth = time.Date(year, month-1, day, 0, 0, 0, 0, time.UTC)
-	} else {
-		fromMonth = time.Now()
-	}
-
+func LoadBankTxs(db *sqlx.DB, fromMonth time.Time) ([]types.BankAccountWithTransactions, error) {
 	slog.Info("loading bank txs", slog.String("fromMonth", fromMonth.Format("2006-01")))
 
 	bankTxs := []types.DbBankTx{}
@@ -76,13 +68,13 @@ func LoadBankTxs(db *sqlx.DB) ([]types.BankAccountWithTransactions, error) {
 		bankAccounts = append(bankAccounts, *bankAccount)
 	}
 
-	slog.Info("printing found bank txs:")
-	for _, bankAccount := range bankAccounts {
-		for _, bankTx := range bankAccount.Transactions {
-			slog.Info(fmt.Sprintf("account: %s, date: %s, doc_no: %s, amount: %d", bankAccount.Account.Number,
-				bankTx.Date.Format("2006-01-02"), bankTx.DocNo, bankTx.Amount))
-		}
-	}
+	// slog.Info("printing found bank txs:")
+	// for _, bankAccount := range bankAccounts {
+	// 	for _, bankTx := range bankAccount.Transactions {
+	// 		slog.Info(fmt.Sprintf("account: %s, date: %s, doc_no: %s, amount: %d", bankAccount.Account.Number,
+	// 			bankTx.Date.Format("2006-01-02"), bankTx.DocNo, bankTx.Amount))
+	// 	}
+	// }
 
 	return bankAccounts, nil
 }
diff --git a/projects/update-ynab/main.go b/projects/update-ynab/main.go
index 28a2bbc..826ec2d 100644
--- a/projects/update-ynab/main.go
+++ b/projects/update-ynab/main.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"log/slog"
 	"os"
+	"time"
 
 	"bank-bots/update-ynab/banks"
 	"bank-bots/update-ynab/types"
@@ -61,12 +62,20 @@ func work() (*string, error) {
 		return nil, err
 	}
 
-	bankAccountsWithTxs, err := banks.LoadBankTxs(db)
+	var fromMonth time.Time
+	if time.Now().Day() <= 10 {
+		year, month, day := time.Now().Date()
+		fromMonth = time.Date(year, month-1, day, 0, 0, 0, 0, time.UTC)
+	} else {
+		fromMonth = time.Now()
+	}
+
+	bankAccountsWithTxs, err := banks.LoadBankTxs(db, fromMonth)
 	if err != nil {
 		return nil, err
 	}
 
-	err = ynab.UpdateYnabWithBankTxs(config, bankAccountsWithTxs)
+	err = ynab.UpdateYnabWithBankTxs(config, bankAccountsWithTxs, fromMonth)
 	if err != nil {
 		return nil, err
 	}
diff --git a/projects/update-ynab/ynab/ynab.go b/projects/update-ynab/ynab/ynab.go
index 0496305..123d86e 100644
--- a/projects/update-ynab/ynab/ynab.go
+++ b/projects/update-ynab/ynab/ynab.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"log/slog"
 	"net/http"
+	"regexp"
 	"slices"
 	"time"
 
@@ -21,12 +22,21 @@ type AugmentedYnabTransaction struct {
 	ParsedMemo *ParsedYnabTransactionMemo
 }
 
-func UpdateYnabWithBankTxs(config *types.Config, bankAccountsWithTxs []types.BankAccountWithTransactions) error {
+func UpdateYnabWithBankTxs(config *types.Config, bankAccountsWithTxs []types.BankAccountWithTransactions, fromMonth time.Time) error {
 	client := ynab.NewClient(config.YNAB.AccessToken)
 
 	ynabTxCreates := []transaction.PayloadTransaction{}
 	ynabTxUpdates := []transaction.PayloadTransaction{}
 
+	type DeleteTransaction struct {
+		Id        string                `json:"id"`
+		FlagColor transaction.FlagColor `json:"flag_color"`
+	}
+	type DeleteTransactionsPayload struct {
+		Transactions []DeleteTransaction `json:"transactions"`
+	}
+	ynabTxDeletes := []DeleteTransaction{}
+
 	for _, bankAccount := range bankAccountsWithTxs {
 		if len(bankAccount.Transactions) == 0 {
 			continue
@@ -69,9 +79,10 @@ func UpdateYnabWithBankTxs(config *types.Config, bankAccountsWithTxs []types.Ban
 			})
 		}
 
+		// upserts
 		for _, bankTx := range bankAccount.Transactions {
-			idx := slices.IndexFunc(ynabTxs, func(e AugmentedYnabTransaction) bool {
-				return e.ParsedMemo.Ref == bankTx.Ref || e.ParsedMemo.Ref == bankTx.DocNo
+			idx := slices.IndexFunc(ynabTxs, func(ynabTx AugmentedYnabTransaction) bool {
+				return ynabTx.ParsedMemo.Ref == bankTx.Ref || ynabTx.ParsedMemo.Ref == bankTx.DocNo
 			})
 			if idx == -1 {
 				slog.Info(fmt.Sprintf("creating transaction: %+v", bankTx))
@@ -102,6 +113,37 @@ func UpdateYnabWithBankTxs(config *types.Config, bankAccountsWithTxs []types.Ban
 				}
 			}
 		}
+		// deletes
+		rgx := regexp.MustCompile(`\d{8,}_\d+(\(\d+\))?$`)
+		isSameOrFutureMonth := func(fromMonth, t time.Time) bool {
+			fromYear, fromMonthNum, _ := fromMonth.Date()
+			tYear, tMonthNum, _ := t.Date()
+
+			if tYear > fromYear {
+				return true
+			} else if tYear == fromYear && tMonthNum >= fromMonthNum {
+				return true
+			}
+			return false
+		}
+		for _, ynabTx := range ynabTxs {
+			if !isSameOrFutureMonth(fromMonth, ynabTx.Tx.Date.Time) {
+				continue
+			}
+			if !rgx.MatchString(ynabTx.ParsedMemo.Ref) {
+				continue
+			}
+			idx := slices.IndexFunc(bankAccount.Transactions, func(bankTx types.PreparedBankTx) bool {
+				return ynabTx.ParsedMemo.Ref == bankTx.Ref || ynabTx.ParsedMemo.Ref == bankTx.DocNo
+			})
+			if idx == -1 {
+				slog.Warn(fmt.Sprintf("marking transaction for deletion: %+v", ynabTx.Tx), "ref", ynabTx.ParsedMemo.Ref)
+				ynabTxDeletes = append(ynabTxDeletes, DeleteTransaction{
+					Id:        ynabTx.Tx.ID,
+					FlagColor: transaction.FlagColorRed,
+				})
+			}
+		}
 	}
 
 	slog.Info(fmt.Sprintf("creating %v transactions", len(ynabTxCreates)))
@@ -124,6 +166,31 @@ func UpdateYnabWithBankTxs(config *types.Config, bankAccountsWithTxs []types.Ban
 			return err
 		}
 	}
+	slog.Info(fmt.Sprintf("deleting %v transactions", len(ynabTxDeletes)))
+	if len(ynabTxDeletes) > 0 {
+		payload := DeleteTransactionsPayload{
+			Transactions: ynabTxDeletes,
+		}
+		jsonStr, err := json.Marshal(payload)
+		if err != nil {
+			return err
+		}
+		req, err := http.NewRequest(
+			"PATCH",
+			fmt.Sprintf("https://api.ynab.com/v1/budgets/%s/transactions", config.YNAB.BudgetID),
+			bytes.NewBuffer(jsonStr))
+		if err != nil {
+			return err
+		}
+		req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", config.YNAB.AccessToken))
+		req.Header.Add("Content-Type", "application/json")
+		httpClient := &http.Client{}
+		res, err := httpClient.Do(req)
+		if err != nil {
+			return err
+		}
+		defer res.Body.Close()
+	}
 
 	return nil
 }