diff --git a/src/components/base/PieChartBase.ts b/src/components/base/PieChartBase.ts
index 0c779273..a4da5c3f 100644
--- a/src/components/base/PieChartBase.ts
+++ b/src/components/base/PieChartBase.ts
@@ -74,7 +74,7 @@ export function usePieChartBase(props: CommonPieChartProps) {
                 };
 
                 finalItem.displayPercent = formatPercent(finalItem.percent, 2, '<0.01');
-                finalItem.displayValue = formatAmountWithCurrency(finalItem.value, props.defaultCurrency) as string;
+                finalItem.displayValue = formatAmountWithCurrency(finalItem.value, props.defaultCurrency);
 
                 validItems.push(finalItem);
             }
diff --git a/src/components/desktop/TrendsChart.vue b/src/components/desktop/TrendsChart.vue
index f6247d30..68f00990 100644
--- a/src/components/desktop/TrendsChart.vue
+++ b/src/components/desktop/TrendsChart.vue
@@ -238,8 +238,8 @@ const yAxisWidth = computed<number>(() => {
         }
     }
 
-    const maxValueText = formatAmountWithCurrency(maxValue, props.defaultCurrency) || '';
-    const minValueText = formatAmountWithCurrency(minValue, props.defaultCurrency) || '';
+    const maxValueText = formatAmountWithCurrency(maxValue, props.defaultCurrency);
+    const minValueText = formatAmountWithCurrency(minValue, props.defaultCurrency);
     const maxLengthText = maxValueText.length > minValueText.length ? maxValueText : minValueText;
 
     const canvas = document.createElement('canvas');
diff --git a/src/lib/currency.ts b/src/lib/currency.ts
index 6b808fac..63394d11 100644
--- a/src/lib/currency.ts
+++ b/src/lib/currency.ts
@@ -1,7 +1,7 @@
 import { CurrencyDisplaySymbol, CurrencyDisplayLocation, type CurrencyPrependAndAppendText, CurrencyDisplayType } from '@/core/currency.ts';
 import { ALL_CURRENCIES, DEFAULT_CURRENCY_SYMBOL } from '@/consts/currency.ts';
 
-import { isString, isNumber } from './common.ts';
+import { isNumber } from './common.ts';
 
 export function getCurrencyFraction(currencyCode?: string): number | undefined {
     if (!currencyCode) {
@@ -12,15 +12,11 @@ export function getCurrencyFraction(currencyCode?: string): number | undefined {
     return currencyInfo?.fraction;
 }
 
-export function appendCurrencySymbol(value: unknown, currencyDisplayType: CurrencyDisplayType, currencyCode: string, currencyUnit: string, currencyName: string, isPlural: boolean): string | null {
+export function appendCurrencySymbol(value: number | string, currencyDisplayType: CurrencyDisplayType, currencyCode: string, currencyUnit: string, currencyName: string, isPlural: boolean): string {
     if (isNumber(value)) {
         value = value.toString();
     }
 
-    if (!isString(value)) {
-        return null;
-    }
-
     const symbol = getAmountPrependAndAppendCurrencySymbol(currencyDisplayType, currencyCode, currencyUnit, currencyName, isPlural);
 
     if (!symbol) {
diff --git a/src/locales/helpers.ts b/src/locales/helpers.ts
index ead3b106..6dfd297a 100644
--- a/src/locales/helpers.ts
+++ b/src/locales/helpers.ts
@@ -1318,11 +1318,7 @@ export function useI18n() {
         return formatAmount(value, numberFormatOptions);
     }
 
-    function getFormattedAmountWithCurrency(value: number | string, currencyCode?: string | false, notConvertValue?: boolean, currencyDisplayType?: CurrencyDisplayType): string | null {
-        if (!isNumber(value) && !isString(value)) {
-            return null;
-        }
-
+    function getFormattedAmountWithCurrency(value: number | string, currencyCode?: string | false, notConvertValue?: boolean, currencyDisplayType?: CurrencyDisplayType): string {
         if (isNumber(value)) {
             value = value.toString();
         }
@@ -1407,9 +1403,9 @@ export function useI18n() {
                     let accountWithDisplaceBalance: AccountWithDisplayBalance;
 
                     if (showAccountBalance && account.isAsset) {
-                        accountWithDisplaceBalance = AccountWithDisplayBalance.fromAccount(account, getFormattedAmountWithCurrency(account.balance, account.currency) as string);
+                        accountWithDisplaceBalance = AccountWithDisplayBalance.fromAccount(account, getFormattedAmountWithCurrency(account.balance, account.currency));
                     } else if (showAccountBalance && account.isLiability) {
-                        accountWithDisplaceBalance = AccountWithDisplayBalance.fromAccount(account, getFormattedAmountWithCurrency(-account.balance, account.currency) as string);
+                        accountWithDisplaceBalance = AccountWithDisplayBalance.fromAccount(account, getFormattedAmountWithCurrency(-account.balance, account.currency));
                     } else {
                         accountWithDisplaceBalance = AccountWithDisplayBalance.fromAccount(account, '***');
                     }
@@ -1454,7 +1450,7 @@ export function useI18n() {
                     finalTotalBalance = finalTotalBalance + '+';
                 }
 
-                finalTotalBalance = getFormattedAmountWithCurrency(finalTotalBalance, defaultCurrency) as string;
+                finalTotalBalance = getFormattedAmountWithCurrency(finalTotalBalance, defaultCurrency);
             } else {
                 finalTotalBalance = '***';
             }
diff --git a/src/views/base/HomePageBase.ts b/src/views/base/HomePageBase.ts
index 2a429238..6b99622d 100644
--- a/src/views/base/HomePageBase.ts
+++ b/src/views/base/HomePageBase.ts
@@ -38,17 +38,17 @@ export function useHomePageBase() {
 
     const netAssets = computed<string>(() => {
         const netAssets = accountsStore.getNetAssets(showAmountInHomePage.value);
-        return formatAmountWithCurrency(netAssets, defaultCurrency.value) as string;
+        return formatAmountWithCurrency(netAssets, defaultCurrency.value);
     });
 
     const totalAssets = computed<string>(() => {
         const totalAssets = accountsStore.getTotalAssets(showAmountInHomePage.value);
-        return formatAmountWithCurrency(totalAssets, defaultCurrency.value) as string;
+        return formatAmountWithCurrency(totalAssets, defaultCurrency.value);
     });
 
     const totalLiabilities = computed<string>(() => {
         const totalLiabilities = accountsStore.getTotalLiabilities(showAmountInHomePage.value);
-        return formatAmountWithCurrency(totalLiabilities, defaultCurrency.value) as string;
+        return formatAmountWithCurrency(totalLiabilities, defaultCurrency.value);
     });
 
     const displayDateRange = computed<TransactionOverviewDisplayTime>(() => {
@@ -75,7 +75,7 @@ export function useHomePageBase() {
 
     function getDisplayAmount(amount: number, incomplete: boolean): string {
         if (!showAmountInHomePage.value) {
-            return formatAmountWithCurrency('***', defaultCurrency.value) as string;
+            return formatAmountWithCurrency('***', defaultCurrency.value);
         }
 
         return formatAmountWithCurrency(amount, defaultCurrency.value) + (incomplete ? '+' : '');
diff --git a/src/views/base/statistics/StatisticsTransactionPageBase.ts b/src/views/base/statistics/StatisticsTransactionPageBase.ts
index ad7e6c56..02f91677 100644
--- a/src/views/base/statistics/StatisticsTransactionPageBase.ts
+++ b/src/views/base/statistics/StatisticsTransactionPageBase.ts
@@ -191,7 +191,7 @@ export function useStatisticsTransactionPageBase() {
     const trendsAnalysisData = computed<TransactionTrendsAnalysisData | null>(() => statisticsStore.trendsAnalysisData);
 
     function getDisplayAmount(amount: number, currency: string, textLimit?: number): string {
-        const finalAmount = formatAmountWithCurrency(amount, currency) as string;
+        const finalAmount = formatAmountWithCurrency(amount, currency);
 
         if (!showAccountBalance.value
             && (query.value.chartDataType === ChartDataType.AccountTotalAssets.type
diff --git a/src/views/desktop/overview/cards/MonthlyIncomeAndExpenseCard.vue b/src/views/desktop/overview/cards/MonthlyIncomeAndExpenseCard.vue
index 8bfb47a5..b31fa426 100644
--- a/src/views/desktop/overview/cards/MonthlyIncomeAndExpenseCard.vue
+++ b/src/views/desktop/overview/cards/MonthlyIncomeAndExpenseCard.vue
@@ -273,7 +273,7 @@ const chartOptions = computed<object>(() => {
 });
 
 function getDisplayCurrency(value: number | string, currencyCode: string): string {
-    return formatAmountWithCurrency(value, currencyCode) || '0';
+    return formatAmountWithCurrency(value, currencyCode);
 }
 
 function getDisplayAmount(amount: number, incomplete: boolean): string {