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Step 1: Make a copy of this spreadsheet : File > Make Copy. Or download it.
Step 2:
If you have not used this tool before watch this instructional video
Step 3: If you've used the planner before, watch this video detailing the updates in this version
Disclaimer: This model does not give financial advice and should not be relied upon to make financial decions. The model may contain errors and James Shack cannot be held accountable for it's accuracy.

All figures entered should be in todays money, the model takes care of inflation.
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Tip - Zoom in by double clicking the Y axis and setting the Max Value
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Key points about this graph:
- Other than the yearly returns, this uses the same assumptions as the other graphs (cashflows, fees, tax, risk)
- It uses US market data because it's hard to find global data that goes back far enough.
- The data set starts from 1928. Here is a link to the data source.
- It takes into account historical inflation
- A "Medium Risk (40-60% Equities)" portfolio will have:
50% invested in the S&P 500
25% invested in US Government Bonds
25% in US Investment Grade Corporate Bonds

Observations (WARNING - USE THIS DATA WITH CAUTION)
- Over the last 100 years the US stock market has done exceptionally well, it's unlikley that we will see another period like it.
- Over the last 40 years interest rates have been falling, which has provided a headwind to bonds and lower risk portfolios. We should not expect to see this happen again in the near future.
- A globally diversfied or UK centric portfolio would have performed worse in most periods (that is not a valid reason to only invest in the US moving forwards)
- Given this, you'll notice that most of these historical scenarios fit between the "Middle" and "Lucky" forward looking scenarios
- The 1920's and 1960 to 1970 were some of the worst times to retire


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>>>>>>>>>>>>>>>Editable Fields<<<<<<<<<<<<<<<<<
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You
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Your Age today50
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Retirement Target57
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Your Liquid AssetsCurrent ValueAnnual Contributions
Annual Change in Contributions
Investment Risk
Real Return (less fees & tax adjustment)
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Pensions£200,000£6,0002.00%Medium/High Risk (60-80% Equities)3.22%
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ISAs£100,000£5,0002.00%Medium/High Risk (60-80% Equities)3.22%
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Other Investments (not property)Medium/High Risk (60-80% Equities)3.03%
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Cash-0.50%
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Average Annual Real ReturnsStart YearEnd Year
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Additional Retirement Income (Gross)
Start AgeEnd Age
Annual Income (in todays money)
Joint Retirement ExpenditureStart Age (Your age)End Age (Your age)
Annual Expenditure (in todays money)
YouUnlucky (Lower Quartile)MiddleLucky (Upper Quartile)Scenario 119451995
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State Pension67100£10,600General Expenditure5775£40,000Pension0.88%3.22%5.63%Scenario 219552005
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Final Salary / DB Pension60100£5,000General Expenditure (age reduction)7690£30,000ISA0.88%3.22%5.63%Scenario 319652015
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Part Time WorkHolidaysOther Investments0.81%3.03%5.32%
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Rental Income (Net of costs)Mortgage PaymentsPartnerNote - Don't pay too much attention to the Lucky Scenarios. If you do get lucky, great, but don't count on it. As financial planners what we're interested in is the Unlucky Scenarios and what levers we can pull to make the plan work if we have to.

Question - What would you need to change to survive an Unlucky Scenario?
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Custom 1CustomPension0.04%1.06%2.09%
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Custom 2Long Term Care91100£60,000ISA0.04%1.06%2.09%
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Other Investments0.01%0.98%1.96%
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The property & mortgage section does not interact with the cashflow model above
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Your Partner
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Property NameCurrent Value
Average Annual Real Capital Growth (growth after inflation)
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Partners Age Today48Primary Residence£600,0002.00%According to Nationwide, long term real UK house price growth has trended near 2.5%. However average UK house prices have not risen in real terms for 20 years. There will be regional differences within this but either way I recomend using a conservative estimate.

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Retirement Target57Custom 1
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Custom 2
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Your Partners Liquid Assets Custom 3
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AssetsCurrent ValueAnnual Contributions
Annual Change in Contributions
Investment RiskReal Return (less fees & tax adjustment)Property Portfolio
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Pensions£100,000Low Risk (0-20% Equities)1.06%
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ISAsLow Risk (0-20% Equities)1.06%Mortgage Name
Interest Only / Repayment
Current BalanceInterest Rate
Remaining Term (Yrs)
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Other Investments (not property)Low Risk (0-20% Equities)0.98%Primary ResidenceRepayment£80,0004.00%7
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Cash-0.50%Custom 1Repayment
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Custom 2Repayment
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Custom 3Repayment
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Additional Retirement IncomeStart AgeEnd Age
Annual Income (in todays money)
Property PortfolioRepayment
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State Pension67100£5,300
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Final Salary Pension
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Part Time Work
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Rental Income (Net of costs)
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Custom 1
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Custom 2
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