diff --git a/src/components/FormField.tsx b/src/components/FormField.tsx
index 1e8527d..c0de79e 100644
--- a/src/components/FormField.tsx
+++ b/src/components/FormField.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useEffect, useRef, useState } from "react";
 import { InfoBubble } from "@/components/InfoBubble";
 import { floorToThousand, formatChf, parseChfInput } from "@/lib/format";
 
@@ -64,11 +64,39 @@ export function MoneyInput({
 }) {
   const [focused, setFocused] = useState(false);
   const [text, setText] = useState(() => String(Math.floor(value || 0)));
+  const valueRef = useRef(value);
+  useEffect(() => {
+    valueRef.current = value;
+  }, [value]);
+  const holdTimeout = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const holdInterval = useRef<ReturnType<typeof setInterval> | null>(null);
 
   function step(delta: number) {
-    onChange(floorToThousand(value) + delta);
+    onChange(floorToThousand(valueRef.current) + delta);
   }
 
+  function stopHold() {
+    if (holdTimeout.current) {
+      clearTimeout(holdTimeout.current);
+      holdTimeout.current = null;
+    }
+    if (holdInterval.current) {
+      clearInterval(holdInterval.current);
+      holdInterval.current = null;
+    }
+  }
+
+  // Klick-und-Halten: sofortiger erster Schritt, nach kurzer Verzoegerung
+  // fortlaufende Wiederholung, bis losgelassen wird.
+  function startHold(delta: number) {
+    step(delta);
+    holdTimeout.current = setTimeout(() => {
+      holdInterval.current = setInterval(() => step(delta), 100);
+    }, 400);
+  }
+
+  useEffect(() => stopHold, []);
+
   return (
     <div className={`relative ${className ?? "w-full"}`}>
       <input
@@ -91,8 +119,17 @@ export function MoneyInput({
           type="button"
           tabIndex={-1}
           aria-label="Um 1'000 erhoehen"
-          onMouseDown={(e) => e.preventDefault()}
-          onClick={() => step(1000)}
+          onMouseDown={(e) => {
+            e.preventDefault();
+            startHold(1000);
+          }}
+          onMouseUp={stopHold}
+          onMouseLeave={stopHold}
+          onTouchStart={(e) => {
+            e.preventDefault();
+            startHold(1000);
+          }}
+          onTouchEnd={stopHold}
           className="flex flex-1 items-center justify-center text-[8px] leading-none text-zinc-500 hover:bg-zinc-100 dark:text-zinc-400 dark:hover:bg-zinc-800"
         >
           ▲
@@ -101,8 +138,17 @@ export function MoneyInput({
           type="button"
           tabIndex={-1}
           aria-label="Um 1'000 verringern"
-          onMouseDown={(e) => e.preventDefault()}
-          onClick={() => step(-1000)}
+          onMouseDown={(e) => {
+            e.preventDefault();
+            startHold(-1000);
+          }}
+          onMouseUp={stopHold}
+          onMouseLeave={stopHold}
+          onTouchStart={(e) => {
+            e.preventDefault();
+            startHold(-1000);
+          }}
+          onTouchEnd={stopHold}
           className="flex flex-1 items-center justify-center border-t border-zinc-300 text-[8px] leading-none text-zinc-500 hover:bg-zinc-100 dark:border-zinc-600 dark:text-zinc-400 dark:hover:bg-zinc-800"
         >
           ▼
diff --git a/src/lib/calculations.ts b/src/lib/calculations.ts
index b034374..4d7969f 100644
--- a/src/lib/calculations.ts
+++ b/src/lib/calculations.ts
@@ -1,4 +1,5 @@
 import { AHV_COUPLE_CAP_FACTOR, AHV_MAX_PENSION_PER_YEAR } from "@/lib/constants";
+import { floorToThousand } from "@/lib/format";
 import type { HouseholdInput, PhaseInput, PlanInput } from "@/lib/types";
 
 export interface SecurityComputed {
@@ -70,16 +71,19 @@ export interface PlanComputed {
   totalSavingsWarnings: number;
 }
 
+// Alle Zwischen- und Endwerte werden auf ein Vielfaches von 1'000 abgerundet (siehe
+// lib/format.ts): nur so bleiben Betraege, die spaeter bei einem Verkauf oder Uebergang
+// auf Wertschriften verteilt werden muessen, ueberhaupt vollstaendig verteilbar.
 export function computeSecurityYearlyValues(
   startValue: number,
   expectedReturn: number,
   annualContribution: number,
   durationYears: number
 ): number[] {
-  const values = [startValue];
+  const values = [floorToThousand(startValue)];
   for (let year = 1; year <= durationYears; year++) {
     const previous = values[year - 1];
-    values.push(previous * (1 + expectedReturn / 100) + annualContribution);
+    values.push(floorToThousand(previous * (1 + expectedReturn / 100) + annualContribution));
   }
   return values;
 }
@@ -91,11 +95,11 @@ export function computeRealEstateYearly(
   amortization: number,
   durationYears: number
 ): { marketValues: number[]; mortgages: number[] } {
-  const marketValues = [marketValue];
-  const mortgages = [mortgage];
+  const marketValues = [floorToThousand(marketValue)];
+  const mortgages = [floorToThousand(mortgage)];
   for (let year = 1; year <= durationYears; year++) {
-    marketValues.push(marketValues[year - 1] * (1 + valueGrowth / 100));
-    mortgages.push(Math.max(0, mortgages[year - 1] - amortization));
+    marketValues.push(floorToThousand(marketValues[year - 1] * (1 + valueGrowth / 100)));
+    mortgages.push(floorToThousand(Math.max(0, mortgages[year - 1] - amortization)));
   }
   return { marketValues, mortgages };
 }
@@ -111,7 +115,7 @@ function computeRetirement(
     ahvAmount: info.ahvAmount,
     pkPensionAmount: info.pkPensionAmount,
     lumpSumAmount: info.lumpSumAmount,
-    lumpSumNet: info.lumpSumAmount * (1 - info.lumpSumTaxRate / 100),
+    lumpSumNet: floorToThousand(info.lumpSumAmount * (1 - info.lumpSumTaxRate / 100)),
   }));
 
   const ahvSum = perPerson.reduce((sum, p) => sum + p.ahvAmount, 0);
@@ -182,7 +186,7 @@ function computePhase(
       // Vereinfachung gemaess TDD 3.3: Gewinn = Verkaufspreis - urspruenglich erfasster Startwert
       const gain = Math.max(0, re.salePrice! - re.marketValue);
       taxAmount = gain * (re.saleTaxRate / 100);
-      saleNetProceeds = re.salePrice! - taxAmount;
+      saleNetProceeds = floorToThousand(re.salePrice! - taxAmount);
     }
     return {
       id: re.id,