Fees, and what they really cost over time

6 min read · Before you start: Lessons on interest and compounding, and unit trusts · Updated 31 October 2026

A fee of 2 per cent sounds small. Over thirty years it is not small at all, because the money taken out is money that never compounds. This lesson does the arithmetic, names the fees that commonly appear, and shows where they are disclosed.

The arithmetic, in one example

Take TT$100,000 invested for 30 years, growing at 7 per cent a year before fees.

No fee: 100,000 × 1.07³⁰ ≈ TT$761,000
1 per cent annual fee (so 6 per cent net): 100,000 × 1.06³⁰ ≈ TT$574,000
2 per cent annual fee (so 5 per cent net): 100,000 × 1.05³⁰ ≈ TT$432,000

The one per cent fee costs roughly TT$187,000 over the period. The two per cent fee costs roughly TT$329,000 — more than three times the original investment's growth gap would suggest at a glance. The fee calculator on the tools page runs these figures for any amount, rate and period. The reason the gap is so large is that a fee is charged every year on the whole balance, so it removes both the money and all the future growth that money would have produced.

A rule of thumb

Over a long horizon, each 1 per cent of annual fee removes roughly a quarter of the final pot. The longer the period, the larger the share lost. The same compounding that works for a saver works for a fee.

The fees that commonly appear

On funds and unit trusts

Front-end or sales charge: a percentage deducted when money goes in, so less than the full amount is invested.
Annual management fee: charged on the value held, every year. It is usually reflected in the unit price rather than billed separately, which makes it easy to miss.
Back-end or exit charge: deducted on withdrawal, sometimes reducing the longer the holding is kept.
Administrative and trustee costs: smaller charges that may sit alongside the management fee.

On shares

Broker commission per trade, often with a minimum charge, plus the exchange transaction fee — reported by Oxford Business Group at 0.18 per cent of the value traded for member firms. A minimum commission is the fee that hurts small and frequent trades most.

On bank accounts and loans

Monthly maintenance or minimum-balance fees.
Transaction fees beyond a set number per month, and ABM fees at other banks' machines.
Loan processing or arrangement fees, often a percentage of the amount borrowed.
Early repayment penalties, which change the arithmetic of paying a loan off ahead of schedule.

On insurance and pension products

Investment-linked policies may carry policy fees, allocation rates below 100 per cent in early years, and surrender charges for ending the policy early. The product summary rather than the brochure is where these are set out.

Comparing like with like

Fees are quoted in different shapes, which makes direct comparison harder than it looks. A few conversions help:

Turn a flat charge into a percentage. TT$250 a year on a TT$10,000 holding is 2.5 per cent a year, not a small administrative detail.
Turn a percentage into money. 1.75 per cent on TT$250,000 is TT$4,375 a year, every year.
Add the entry cost to the annual cost. A 3 per cent front-end charge spread over an expected five-year holding is about 0.6 per cent a year on top of the annual fee.
Check what the quoted return is net of. Published fund returns are often shown after the management fee but before any sales charge.

Where fees are written down

For funds, the prospectus or offering document and the fund fact sheet set out charges. For brokers, the published fee schedule does. For banks, the schedule of charges is usually a downloadable document on the bank's website, and banks notify customers when it changes. The TTSEC's investor education material covers questions to put to a registered adviser about costs.

Fees are one factor among several. A higher-cost product may offer something a cheaper one does not, and the cheapest option is not automatically the best fit for a given purpose. What the arithmetic above establishes is the size of what is being traded away, so the comparison is made with the real number in view.

Key ideas: An annual fee compounds against you exactly as returns compound for you. Roughly a quarter of a long-term pot can go to each 1 per cent of annual fee. Flat charges and percentage charges are comparable once both are converted to the same form. Fee schedules are published documents.

Where sources differ, go to the source. Marketing material and fee schedules do not always carry the same detail. The prospectus, the published schedule of charges and the signed agreement are the record. Useful places: TTSEC investor education, Central Bank of Trinidad and Tobago.

Test yourself

Quick check 1 of 3

Why does a 1 per cent annual fee cost far more than 1 per cent over thirty years?

Quick check 2 of 3

A flat charge of TT$250 a year applies to a TT$10,000 holding. As a percentage, that is:

Quick check 3 of 3

Which kind of trade is most affected by a broker's minimum commission?

Not financial advice. This lesson is general education only. See our editorial policy and disclaimer.