Thanks, Red.
Apologies for the delayed response, I had a busy week and I wanted to try 
your suggestion first, looking at Fava to see what were the consequences of 
using Asset accounts.
To be fair, I had already tried them in the past but:
- I had not used accounts under the same hierarchy (`Asset:Partner`), so 
contributions and expenses felt somewhat disconnected
- it felt weird because it didn't seem to satisfy the idea of an Asset 
account as "something I have" (that's still true for Assets:Partner:Expenses
).

>From what I can see, though, your suggestion:
- ensures Net Worth is correct
- allows me to keep looking at my own slice of the expenses
- allows me to look at aggregate (shared) expenses

...so I think I can live with the slight conceptual weirdness of the 
partner expenses "asset"!
Thanks again, 😌

Angelo
On Monday, 3 July 2023 at 19:55:18 UTC+1 Red S wrote:

> I would personally use an Assets:Partner account:
> Assets:Partner:Contributions ; instead of Equity:PartnerContributions 
> Assets:Partner:Expenses ; instead of Equity:PartnerExpenses 
>
> This:
>
>    - makes it trivial to query your partner’s contributions and expenses 
>    (they’re just the accounts above)
>    - Optionally, you could add ` Assets:Partner:Expenses:Phone`, ` 
> Assets:Partner:Expenses:Utilities` 
>    etc. 
>    - the top-level account (Assets:Partner) trivially tells you if your 
>    partner owes you, or you owe her, or you’re even at any point in time 
>    (positive/negative/zero balance) 
>    - in addition, this is factored into your own Assets automatically, as 
>    it should. I.e., if your partner owes you 100 GBP, it is automatically a 
>    part of your own assets, as it should be 
>
> ​
>
>
>
> On Monday, July 3, 2023 at 7:09:14 AM UTC-7 [email protected] wrote:
>
>> Hi, everyone; apologies in advance for the wall of text.
>>
>> So, I have a fairly common use case (sharing expenses with my partner), 
>> and I know it's been discussed before, but there are still a couple of 
>> things I'm not sure about. I realise there may be different ways of going 
>> about it (one may be to use the autobean.share 
>> <https://github.com/SEIAROTg/autobean/tree/master/autobean/share> 
>> plugin, but I'm wary of adding plugin-specific metadata for now).
>>
>> *Previous relevant threads, for reference*
>> - Loosely tracking shared expenses between partners 
>> <https://groups.google.com/g/beancount/c/p05e3hMqpJY/m/GJxoI33sBAAJ> 
>> (Dec 17)
>> - Expenses paid with external account 
>> <https://groups.google.com/g/beancount/c/USNXP2vIWHY/m/dMZdeUXrCQAJ> 
>> (Jun 20)
>> - Payees, subaccounts, channels 
>> <https://groups.google.com/g/beancount/c/vefi9DzrU4s/m/tB2nsseJAgAJ> 
>> (Jul 22)
>> - Sharing household expenses 
>> <https://groups.google.com/g/beancount/c/K8SSrCVikeY/m/bO0Aa1ONAQAJ> 
>> (Aug 22)
>>
>> *My scenario*
>> - I use Beancount, my partner doesn't (meaning she doesn't care for the 
>> same level of granularity in expense accounts, but she may be interested in 
>> coarser aggregates).
>> - We have a joint bank account which we use for shared expenses.
>> - We're adding a fixed amount to said account each month.
>> - We split shared expenses (and, consequently, deposits to the joint 
>> account) roughly in proportion to our relative income, so it's not 50/50.
>> - The bank where the joint account is (Monzo) has a decent API, so I can 
>> get a JSON dump of all transactions, or a delta.
>> - I have an importer for our joint account which can already do the math 
>> and prorate a posting's amount accordingly. I suppose it would be easy to 
>> turn the prorating part into a plugin instead, in case that made more sense.
>> - I still review transactions manually, to fix payees and expense 
>> categories as required.
>>
>>
>> *Sample ledger*
>> Here's a public gist 
>> <https://gist.github.com/tatablack/2a2b733ec5979ad052721f264492585f> 
>> with a sample ledger. In this example I am using Equity accounts for both 
>> my partner's deposits and her share of expenses from the joint account; 
>> e.g.:
>>
>> 2023-06-01 * "My partner" "June top-up: 40% of £2000"
>> Equity:PartnerContributions -800.00 GBP
>> Assets:UK:SharedBank:Joint
>>
>> 2023-06-12 * "Electricity" ""
>> Expenses:Bills:Electricity 0.60 * 150.00 GBP
>> Assets:UK:SharedBank:Joint -150.00 GBP
>> Equity:PartnerExpenses
>>
>> *Solved problems*
>> My goals include being able to build reports showing my own expenses as 
>> well as an aggregate of our shared ones (e.g. "how much are OUR rent + 
>> bills + subscriptions each month?"). Red's suggestion 
>> <https://groups.google.com/g/beancount/c/K8SSrCVikeY/m/P8HzhLhHAwAJ> to 
>> use BQL's FINDFIRST and other_accounts works well for this. 
>>
>> *Questions*
>> 1. Should I consider my partner's monthly deposits to our joint account 
>> as "Income" instead? It doesn't feel right, because I can't really dispose 
>> of that money other than for sharing expenses, but mainly because I don't 
>> want to track the equivalent outgoing transactions under my own "Expenses" 
>> hierarchy.
>>
>> 2. Looking at the definitions of the various types of account in the 
>> docs, I can't figure out what type of account my partner's share of 
>> expenses should be booked to—"Equity" feels a bit of a hack.
>>
>> "Equity" should, according to the docs, be used for accounts that hold a 
>> "summary of the net income implied by all the past activity". In my head, I 
>> could apply this to the account used to deposit money into the joint 
>> account, but not to the one for expenses.
>>
>> Any other suggestions? Anything obvious I'm missing?
>>
>> Thanks in advance!
>>
>> *Angelo*
>>
>

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