How to Track Your Net Worth (and Why Your Portfolio Is Only Part of It)

Most investors know their portfolio value to the pound and have only a vague idea of what they are actually worth. Your ISA balance says nothing about the mortgage, the workplace pension you have not checked in years, or the car quietly losing value on the drive. Learning to track your net worth pulls all of it into one number: everything you own minus everything you owe, the standard definition of net worth. This guide covers what to include, how to value each item honestly, and how to build a system you will keep up.

Key Takeaways

Question	Short, Practical Answer
What is net worth?	Everything you own minus everything you owe, measured on a fixed date.
Why not just track my portfolio?	Your portfolio can rise while debt grows faster. Net worth catches that.
Do pensions count?	Yes, but they are locked until minimum pension age (rising from 55 to 57 in 2028) and partly taxable, so treat them as illiquid.
How should I value my home?	Conservatively: recent sold prices for similar homes, less selling costs. Never the asking price.
How often should I update it?	Monthly or quarterly. Daily checking mostly measures market noise.
What drives growth?	Early on, how much you save. Later, investment returns.

1. What Net Worth Is, and Why It Beats Portfolio Value

Net worth is total assets minus total liabilities at a single point in time. If you sold everything you own at a fair price and repaid everything you owe, it is roughly what would be left.

Portfolio value is only a subset, and on its own it can tell the wrong story:

• Investing while carrying expensive debt. Your ISA grows by £3,000 while a credit card balance grows by £4,000. The portfolio looks healthy; your position went backwards.
• Overpaying your mortgage. Each extra payment means less invested but more home equity. Portfolio-only tracking treats a sound decision as falling behind.
• Buying a house. Moving a deposit into property shrinks your portfolio overnight, though your wealth barely changed apart from stamp duty and fees.

Net worth is indifferent to where your money sits. It rewards paying down debt, saving and investing equally, which is how your finances actually work.

2. Investments, ISAs and Cash

Include stocks and shares ISAs, general investment accounts, crypto and any employee shares you are free to sell, all at current market value rather than what you paid. A Lifetime ISA counts, but it carries a withdrawal charge for most uses other than a first home or retirement, so treat it as semi-locked. If a holding outside an ISA or pension has a large unrealised gain, a rough deduction for capital gains tax makes the figure more honest.

Cash savings, fixed-term bonds and Premium Bonds count at face value. Take your snapshot on the same day each month, ideally just before payday, so your total does not bounce around with your salary.

3. Pensions: Real Money, Locked Away

For many UK households, pensions are the largest asset after the home and the one most often left out. Ignore them and you understate your wealth; treat them like cash and you overstate what you can use.

Defined contribution pensions (most workplace schemes and all SIPPs) have a pot value on your provider’s statement or app. Count it, but remember:

• It is locked. You normally cannot access it until the minimum pension age, currently 55 and due to rise to 57 in 2028.
• It is partly taxable. Usually up to a quarter can be taken tax-free, within limits, and the rest is taxed as income.
• Old pots go missing. If you have changed jobs often, the government’s pension tracing service can help you find old schemes.

Defined benefit pensions promise an income rather than hold a pot. Many people simply note the promised annual income alongside their net worth rather than inventing a capital figure. Treat the State Pension the same way: valuable, but not an asset you can sell. If you are deciding where new money should go, our guide to ISA vs SIPP for UK investors covers the trade-off between flexibility and tax relief.

4. Property, Vehicles and Business Equity

Property is usually your largest asset and the easiest to overstate. Value it at what it would realistically sell for today: look at recent sold prices for comparable homes nearby, take a figure towards the lower end, and deduct a few per cent for agent and legal fees. Record the mortgage separately so you can see your equity.

Vehicles are depreciating assets: their value falls every year whether you drive them or not. Use a realistic private sale or trade-in value and mark it down annually. Some people leave cars out entirely as consumption rather than wealth. Either is fine if you are consistent and any car finance stays in as a liability.

Business equity is real but hard to value and harder to sell. Use a conservative figure, such as net assets or a modest multiple of sustainable profits, and keep it on its own line so it does not dominate the picture. Possessions such as jewellery or collections are best left out unless you would realistically sell them.

5. Liabilities, Including the Student Loan Question

For most people the list of liabilities is short:

• Mortgage: the outstanding balance from your latest statement, not the original loan.
• Personal loans and car finance: the settlement figure.
• Credit cards: the current balance, even if you clear it monthly; the cash waiting to pay it offsets it.
• Overdrafts, buy now pay later and money owed to family: small, easy to forget, still debt.

UK student loans are different. On the main income-contingent plans, repayments are a percentage of income above a threshold, and any balance left after a set number of years is written off. Interest added to the balance does not change your monthly repayment; it mainly changes how much might eventually be cancelled. You can check the rules for your plan on the GOV.UK student loan repayment pages.

So the headline balance can overstate what you will actually pay. Three reasonable approaches:

1. Include the full balance, the most cautious view and the right one if you expect to clear it.
2. Include your best estimate of what you will repay before write-off.
3. Exclude it, treat repayments as closer to an extra tax on income, and note the balance separately.

Whichever you choose, stick to it. Switching methods creates jumps that have nothing to do with progress.

6. An Illustrative Net Worth Statement

Here is a simple statement for an illustrative household; all figures are invented.

Item (illustrative)	Type	Value
Stocks and shares ISA	Liquid asset	£38,000
General investment account	Liquid asset	£6,000
Cash savings	Liquid asset	£12,000
Workplace pension	Illiquid asset	£54,000
Home (conservative, after selling costs)	Illiquid asset	£320,000
Car	Illiquid, depreciating	£9,000
Mortgage	Liability	-£210,000
Car finance and credit card	Liability	-£6,200
Net worth		£222,800

The headline is £222,800, but the split matters as much. Liquid assets, cash and investments you could reach within days, total £56,000. Subtract the non-mortgage debts and liquid net worth is £49,800. The other £173,000 is tied up in home equity, a pension and a car.

Total net worth shows long-run progress. Liquid net worth shows resilience now: how long you could cope with a job loss, or whether you could meet a large bill without borrowing. A big house and pension with little liquid net worth is wealthy on paper and fragile in practice.

Total net worth measures how far you have come. Liquid net worth measures how many options you have this year.

7. Buckets, Savings Rate and Returns

Splitting net worth into a few buckets makes progress easier to read. A practical set is safety (emergency cash), accessible investments (ISAs and general accounts), retirement (pensions), home equity and other. Each quarter, note what changed in each bucket and why: contributions, growth, debt repayment or revaluation.

Early on, this shows that net worth is driven mostly by your savings rate (the share of take-home pay you save or invest), not by how well you invest.

An illustrative example: you invest £500 a month (£6,000 a year) and earn a steady 5% a year, an assumption for simplicity rather than a forecast.

• Year 1: you contribute £6,000 and growth adds roughly £160. Contributions are about 97% of the change.
• Year 10: the pot is around £77,000. You add £6,000; growth adds around £3,600.
• Year 15: growth in the year (around £6,200) overtakes contributions for the first time.
• Year 25: growth adds roughly £13,900, more than double what you put in. The pot is around £294,000, of which £150,000 came from contributions.

In the early years, agonising over fund choice matters far less than raising your savings rate. Later, returns dominate, and costs and asset allocation deserve more attention. Separating contributions from growth is also the only way to see your true performance, as our guide to measuring your real investment returns explains.

8. Distortions That Flatter the Number

• Counting the house at the asking price. Asking prices reflect a seller’s hopes, and online estimates can lag a falling market. Use sold prices, less selling costs.
• Ignoring tax on pension withdrawals. A pension pot is largely pre-tax money. If roughly three-quarters will be taxed at the 20% basic rate, a haircut of around 15% gives a fairer picture. Some people keep both gross and after-tax figures.
• Double-counting. Listing uninvested ISA cash as both savings and investments, adding a house deposit fund on top of the account it sits in, or counting a joint account in full for both partners. Decide whether you track an individual or a household.
• Using purchase prices. Cars and business stakes recorded at cost will steadily overstate your wealth.

9. A Simple System: How Often, Which Tool, How Secure

Frequency. Monthly or quarterly suits most people. Pick a fixed date and update everything at once; property, vehicles and business values need revisiting only once or twice a year. Resist checking daily: with a meaningful portfolio, the daily change is mostly market noise and invites reactive decisions.

Spreadsheet or app. A spreadsheet is free, flexible and private, but every update is manual and the habit easily lapses. An app pulls investment values automatically and charts your history, but means trusting a third party with your data. Many people use a hybrid: an app for fast-moving investments and a short spreadsheet for property, pensions and debts. Our roundup of the best portfolio trackers in the UK compares the options.

Privacy and security. Your tracker holds a complete map of your finances, so:

• Prefer read-only connections that can view holdings but cannot trade or withdraw.
• Never hand over login passwords. A reputable tool should not need your broker or bank password.
• Know how to revoke access from the provider’s side at any time.
• Protect the spreadsheet too with two-factor authentication, and avoid sharing screenshots showing account details.

10. A Quarterly Net Worth Checklist

1. Use the same snapshot date every time.
2. Update investments and cash at current values.
3. Check pension statements and trace any missing pots.
4. Revalue property and vehicles conservatively, once or twice a year.
5. Update every liability, including your chosen student loan treatment.
6. Calculate total and liquid net worth.
7. Split the change into contributions, growth and debt repayment, and note your savings rate.
8. Write one sentence on what changed and why.

11. Tracking Net Worth With InvestInsight

InvestInsight is a portfolio tracker first, so it covers the investment side of your net worth in depth and the rest more simply.

The portfolio tracker syncs Trading 212 using a read-only API key, stored encrypted and revocable at any time. For other brokers you can add transactions manually or import them from CSV. You also get analytics, dividend tracking and GBP, USD or EUR display.

For wider wealth, each portfolio has an Other assets card where you can add property, savings, pensions, vehicles, business stakes or anything else with a value. These appear alongside your securities with a combined “Net worth (with investments)” total.

To be clear about the limits: InvestInsight does not track liabilities and does not connect to bank accounts (there is no Open Banking). You would either enter property at its net equity, the estimated price minus the mortgage, or keep a short spreadsheet of debts and subtract them yourself. Budgeting apps handle bank aggregation, other trackers such as getquin take different approaches, and a plain spreadsheet works well too. The right tool is the one you will still be updating in two years.

12. Common Mistakes to Avoid

• Comparing your number with other people’s. Age, inheritance and housing dominate. Compare with yourself a year ago.
• Tracking obsessively, then stopping. A quarterly habit you keep beats a daily one you abandon.
• Changing valuation methods. Switching how you value the house or student loan creates meaningless jumps.
• Treating rising house prices as spendable. You cannot use equity in your home without moving or borrowing.
• Selling to stop a falling number. Net worth dips in market declines; selling into one can make a temporary fall permanent.

Conclusion

To track your net worth well, you need a complete list of what you own and owe, honest valuations and a fixed routine. Count pensions but remember they are locked and partly taxable, value your home at what it would really sell for, and choose a consistent student loan treatment. Track both total and liquid net worth, then use the number to understand what drives your progress: early on it is almost always your savings rate, later your returns. An hour a quarter is usually all it takes.

Further reading

These official and independent resources help with the parts of net worth that are hardest to pin down.

• GOV.UK: check your State Pension forecast
• MoneyHelper: free, impartial money guidance
• Office for National Statistics: UK economic and household data

This article is for general information only and does not constitute financial advice. All figures are illustrative and historical patterns are not reliable indicators of future results. Consider your own circumstances or speak to a qualified adviser before making investment decisions.