ProjectionLab gives you a Monte Carlo probability of retirement success. Useful, but you still need to decide what to do this month. Delphina gives you a date and an action. Here is the honest difference.
ProjectionLab is a US retirement planning tool that runs Monte Carlo simulations. The platform models the probability of running out of money based on your spending, portfolio, and retirement age. It is one of the more sophisticated consumer-facing retirement tools for the US market.
Delphina is built for the UK. The platform runs UK-specific rules (State Pension forecast, ISA subscription limits, pension tax-free lump sum) and gives you a date, not just a probability. A date is more useful than a probability for most UK households asking "when can I retire?".
ProjectionLab's Monte Carlo simulations are detailed. The platform models correlated asset returns, dynamic withdrawal strategies, and sequence-of-returns risk. For US households close to retirement, the probability output is useful for stress testing.
The platform also handles complex US tax situations including Roth conversion ladders, Social Security timing, and Medicare premium modelling.
Delphina is built for the UK. It uses UK pension rules, ISA limits, the State Pension forecast, and the dividend and capital gains allowances. ProjectionLab's US-specific tax modelling is irrelevant for a UK household.
Delphina also gives you a date and an action, not just a probability. A 42-year-old with £148,000 in pensions and £35,000 in ISAs gets a specific answer in Delphina: "at your current pace, you reach the moderate retirement number of around £580,000 at age 64 and 7 months. Add £300 a month to your SIPP and you reach it at 63 and 11 months." A probability does not tell you what to do. A date and an action do.
| Feature | ProjectionLab | Delphina |
|---|---|---|
| US-specific tax modelling | ✓ | ✗ |
| Monte Carlo simulations | ✓ | ✓ |
| UK pension rules modelled correctly | ✗ | ✓ |
| UK State Pension forecast | ✗ | ✓ |
| Date-based retirement projection | ✗ | ✓ |
| Goal-based monthly action list | ✗ | ✓ |
| FIRE number and date projection | ✗ | ✓ |
| Daily UK-specific category caps | ✗ | ✓ |
| Connects to your real bank and pension | ✗ | ✓ |
| Annual Cost | From $9/month | Free tier available |
Pull your State Pension forecast from gov.uk and your latest pension statement. Connect both to Delphina this week. Within 15 minutes you will have a specific date-based UK retirement plan with a monthly action list. A probability is interesting. A date is useful.